John, the reason I brought the later cz's into the picture is because they are overall a better relic machine than the F Series and the MXT's, too much interference cancels deep, good targets.. One other thing to consider though is that with an oval shaped DD Whites coil, the MXT will handle bad ground better and with less noise too. After playing around with an MXT I became quickly disinterested in it at all, and the scrap and junk in the soil made so much noise that it was almost as bad as the Garrett Ace series, so I happily went back to searching with my CZ. Here is a good rule to follow; If a detector will work better than most others in high Fe soil and high salt soil simultaneously, it will also work better than most when searching in the Civil War soil. As you probably already know, Oregon was not involved in the Civil War, but we do still have old military sites and forts here anyway maintained to keep the peace among pillaging and plundering groups of people, and even in this harsh dirt here the CZ outshines the MXT, the T2, (AND) the F75, AND the various Minelabs when searching for relics. There are two old military forts within 40 miles of my home. I don't really care if my candor about brand comparisons make people uncomfortable hearing it, because it's true and that's just the way it is. This part of the country is the real testing grounds for metal detectors because of its nasty soil, and that's why most metal detector companies started right here, instead of somewhere else. At least 6 metal detector companies started within 60 miles from my home here where Whites main plant is. The T2 is a bit noisier here than the F75, and a Minelab is as rare as a silver bullet laying right on top of a pile of fresh sawdust, because Minelabs normally can't handle this iron soil here well at all. From what I have seen, a Vista Gold will work well in (your) mild soil, and so will a Tejon (maybe even the best?), and perhaps one of the Bulgarian machines because they are designed for the wussie dirt. A Nexus would probably go even deeper than a Vista or Tejon in your soil, but I wouldn't gamble the house on it, we always should try before we buy. And one last thought, there is never a detector of the same type, the same brand, the same style, and the same series and the same age that will perform "exactly the same" as the one that is "just like it", especially when it comes to a Tesoro.
or do they each run the same SAT speed. If I recall, and please correct me if I am wrong, I have never owned a MXT, in Prospecting Mode,SAT speed can be set seperately? Well as I stated, I am looking for a new relic machine and was happy when I seen you had experience with both of the machines above. 
