I think I have pretty much decided on getting the MXT PRO but have a couple questions. I currently am using a DFX 300 with a stock coil but feel I am missing some deeper targets. For example on mercury dimes I just get a quick chirp on targets 5" or more. Will the MXT PRO find these with a sharper tone? I mainly hunt relics and old coins. I find a lot of relics here in east Tennessee but I am going to the DIV in March and I hear the DFX is not the best machine to take on that Culpepper soil. I know the MXT PRO will do well for relics but how does it do on deeper coins? How are the tones say for deep dimes?