Fella's, I never thought I'd say this, but an AT-Maxx may have equivalent if not better results for every scenario but salt water.
This year I decided to "Pay the Piper" and get professional training to increase my finds rate. Honestly, I'm surprised at what I've learned so far. Especially when learning how to dial in a machine. I've shared stories about stumping Garrett techs with ATP problems at beaches and yet, I watched an ATMaxx outperform my CTX & NOX in depth, sensitivity and accuracy of target ID. Now submerge the AT in salt water and it falls flat on its face, but for sand hunting, I'm seeing a bigger picture. There are options and ways if you have the experience and know-how. But sure, for the average guy that turns on both machines and hits auto...the NOX will be more effective "for him".
This doesn't mean I'd buy an AT-P/M, but it means if a professional shows up with one and says he'll go head-to-head against one of my MF-VLF machines, I'll actually take him seriously. Again, this is on the beach and not "IN" the water.
-David