Tell me what one of those 3 have that the other two don't? There isn't much of a difference in any of they three listed, and what small advantage one holds over another in something, it also lags behind in something else. You will get about the same depth out of all 3, all can pinpoint, all come standard with a concentric coil, all of them will try to tell you what's in the ground, and they all cost around $200. The only tried difference I see in them is that one is yellow, one is black, and one is red.
You got yourself a great detector. Trust me, that 4" coil will come in handy. I never thought I would need one, until I bought my F-75, which came with one, and realized how much easier it made it to search in trashy places. If you stick with it, you'll be making great finds in no time!
