I feel I can answer that quite easily.
Well, I <EM>could</EM> answer it easily if I knew what <EM>YOUR</EM> definition was of an "all-around coil." We all have different types of sites we hunt, some differing types of trash we encounter, and might not all be hunting for the same thing(s) (ie: coins? relics? jewelry?) and that can make a difference in which coil/coils you might feel better off with.
So, to respond let me first assert my feeling that I wish they would have brought out the MXT with a decent 8" diameter coil rather than the stock 950 it comes with. If they would have done that, coil selections would be a lot easier. <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt="
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So, if you were only going to own one accessory coil to compliment your stock 950, I would say the 5.3 Eclipse would be, perhaps, the best choice. It is maneuverable in brushy environments and can pick good targets out of trash quite well.
In my personal opinion, White's 5.3 Eclipse is the all around best single coil to get to compliment the 950 for <EM>most</EM> hunters with <EM>typical</EM> smaller-coil needs.
Now, for those who would like to own more than one accessory coil, then my response is different. I like the 8" EXcelerator Double-D a LOT more than the stock 950. It's a little quieter in operation requires less sweep across a detected target, and gets very good depth of detecetion. In addition to that, the rod/coil mounting point is better located than is the 950 coil, and the general 'feel' of the 8" EXcelerator, to me at least, is more comfortable than the stock 950, even though it is about an ounce heavier (if both coils have coil covers in place).
So far as I am concerned, unless a person felt they needed a larger-than-stock coil for bigger targets and/or a little more depth, the two best coils to have that work well and compliment each other are the 8" EXcelerator and the 5" EXcelerator.
But if you have an MXT, only the stock 950, and just want one "do-it-all" general purpose coil, the 5.3 Eclipse ought to serve you just fine.
<EM><STRONG>Monte</STRONG></EM>