Hey Greg, I have used both the DFX and The Explorer II. After using the DFX for two years here in Michigan, and even hunting with Steve Lehto, I know Steve wont like me to say this, but I can tell you without a doubt, your finds will more than triple after you learn the Explorer from Mine Lab.It just goes deeper.
I also agree with everyone else, that you will need to purchase a X-1 Probe from Sun Ray and a Deep shovel..
Ralph is a great guy at Sun Ray with a great product. He stands behind his product 100%. I recommend you buy this one before you get a smaller coil. I usually don't say that, but in this case I will. Do this its a smart move and you wont regret it. As far as shovels go, I recommend a great shovel from Predator Tools. The Relic Pro T ( MR T) with the long handle. Its a George leashe design so you know its quality. You will need this too.
One more thing and I know I'm going to hear allot of slack for this one, Toss the Koss head phones that come with the Explorer!!! Get a pair of Black Widows, The Black Widows, really take out the Basie sound out that the Koss make. The Widows put out a stronger clearer signal and make it easy to determine if the Target is a keeper or not.
If you need any help with shorting the learning curve, PM me and I'll send you my set up I use on the Explorer II.I would like to also add one more thing. Sandra at Mine Lab is the best. If you ever have any problems at all, just give her a call and she will take care of you. Mine lab has really step up to the plate and is really taking great care of there customers. their customer relations is top shelf, hands down the best Ive ever had.
Tom Weaver