Hi,
I have to second what Monte says to a large degree. But I thought I'd toss in a long morning coffe post.
I am a multiline dealer in Anchorage, Alaska. The MXT was my second most popular machine this year. The reason it is so popular is that my bestselling machine is the GMT. What people in my area are always thinking about is gold nuggets. So they usually want a "gold nugget only" machine - the GMT, or a "very interested in gold nuggets but want to do everything" machine - the MXT.
I sell all the other brands, and have no particular personal brand loyalty. I currently own Fisher, Garrett, Minelab, and White's units for various uses. But if asked what one machine would be best for hunting gold nuggets one day and coins the next, my answer is the MXT. The MXT is a very good good machine that has found countless pounds (yes pounds) of gold in Alaska. And yet as you know it is a pretty darn good coin detector.
But the fact is that it's strength on gold does play against it for coin detecting. The machine is noisy compared to dedicated coin detectors, and its depth on silver, while good, certainly is not as good as something like the Minelab Explorer, which basically was designed as a silver getter.
But like Monte, I do not use the Explorer myself, as I also find it uncomfortable to use, and too slow for my taste. Don't get me wrong; it is an excellent machine, with great depth. You'd have a hard time going wrong with it if getting deep silver is your main criteria. I just put a huge premium on how a machine feels and sounds and the Explorer just does not do it for me. For a long time I was a CZ user, as I like the sharp tones and when hipmounted the CZ puts no weight on my arm. I still have a CZ-70 Pro and may drift back to it sometime.
But I really have not found the perfect machine for my coin and jewelry use yet. For gold detecting I have three that all together do it for me. The Minelab GP 3500 is my main gold getter. But if I am chasing smaller gold I use the Fisher Gold Bug 2. And for nuggets in very trashy areas, like old campsites, I use the MXT. They each have an edge over the other two for some particualr nugget task, and so I simply need all three.
The same problem exists for coin detectors. I just can't seem to settle on one that really seems to do it for me, but I'm still looking. My preferred general use machine this summer was the White's DFX, which makes a good machine if you already own an MXT (I do) as you can share coils between the two machines.
I like a coin machine that is relatively simple, is light in weight, and which has clean, quiet operation. Depth is somewhat secondary as I like using small coils and hitting trashy areas for the shallow silver I still seem to be able to find. My CZ hipmounted and with 5" coil still seems to be my standard to beat in some ways.
So I played around a lot with the Garrett Ace 250 (really fun little unit), and the new Minelab X-Terra 50 got some last minute use before I got froze out. I do a lot of jewelry detecting, and so crazy as it may seem to some folks one criteria I have is that my detectors must offer me the option of tuning out coins. I hunted coins so long that if I hear them it bugs me not to dig them, and so if I am after gold jewelry I prefer to simply not hear them. My MXT would be a great jewelry detector for me except that it is noisy in general, and I cannot notch out the top end targets. The DFX is far smoother, and lets me notch out coins so I can concentrate on low end gold and aluminum.
The Ace was a blast in that it is very light, and very easy. Pretty much just fun to use. But it has not quite enough target resolution for me, and if deep silver is your goal it has only moderate depth. But ultimately I went back to my DFX. Then came the X-Terra 50. It has great promise for my uses, but the truth is that I simply did not get enough time to use it before the ground froze. It gave a good first impression, but I'm a bit doubtful it will make me set the DFX aside. A lot will depend on the accessory coils that are released for the XT-50.
And you know what, just typing about my old CZ has got me wanting to dig it out and use it again! I still am fond of that machine and it's sharp tones. And yes, the CZ-70 Pro will notch out the coins.
I ramble on like this just to show that we all have lots of preferences that matter most to only us. I get people who argue with me about my preferences, who tell me I would do better doing this or that. They do not understand that I've been detecting for 35 years, and that I do it now as much for the Zen like meditative state I enter when doing it as anything else. I can go out and dig aluminum for a couple hours and have a great time. Every time an aluminum target comes up I get this little feeling that says "yup, still gold around here". I've long since found I can find anything with almost any detector made. It is more about picking the right places to hunt, and getting out and hunting a lot, then about having any particular detector. Certain feels and certain sounds just make it a more pleasurable experience for me, and I'm still looking for that perfect coin/jewelry machine.
I mentioned on the DFX forum how I'd like a programmable tone id so I could assign any VDI and tone selectively instead of having to choose between 1, 2, or 254 tone modes. The Explorer does not turn me only with its musical responses, and I'm no less fond of the the multi-tone mode in the DFX. People always come back and tell me I just need to use it and learn to love it. They do not get that I want detectors to do what I want, not make myself do what the detector wants.
The problem is that my perfect machine would have to weight less than 2 pounds, have only an on/off knob, and make a nice pleasant sound only on "good targets" while ignoring "bad targets", whatever I deem those to be. Is that asking too much? The X-Terra 50 is a move towards my ideal machine, as it is light in weight, has enough target resolution for me to pick what I want to concentrate on (usually jewelry but if not then silver - I'm very much a "cherry picker") . The tones are good on my ear, and they hit my preferred areas mid-low is gold jewelry/aluminum and high is silver/large clad. Mid-hi tone is the zinc/copper penny tone, which of late I've considered as trash targets.
As far as the MXT goes, I hate to see them tone it down much. It might make it a better coin detector, but it would no doubt give up some ability to do what it does best in my market area - find gold! We have enough coin detecots on the market, and so the best answer is just use another unit to look for silver. But if you get the Explorer I'd advise you to keep your MXT for some time. You might end up missing the MXT, because as Monte has pointed out, there isn't a single detector that will do it all "the best." I've come to the point I have to where I've found it is not the finding but the looking that I enjoy most, and so "best detector" can come to mean something entirely different than "goes deepest".
Well, I've rambled on enough. I think I'll go dig out my CZ and run a coin under it and listen to it go "tink". I always liked that sound!
Steve Herschbach