I have owned over the years, the XLT,DFX and the MXT.I purchased the new M6 based on it having the circuitry of the MXT without the prospecting,relic mode. I have to say due to the ease of use and performance over all I prefer it over the others listed above due to the fact I am mainly a coin shooter. I hunt a lot in old iron infested sites where old lease houses have been torn down. I find that slowing the swing speed down and locking the GB or tracking really smooths things out in this environment. The detector performs well with the 6x10DD and the 5.3 Eclipse coils in trash, iron trash or junkie sites. I just recently pulled a 1943 silver dime and 2 Indian heads 1872,1910 and a few wheat cents from the late 1920s out of a well hunted iron infested site from the late 1800 with the M6. I really liked my MXT but did not use the prospecting and relic mode, therefore I have to say for coin & jewelry hunting I give a thumbs up to the M6 over the MXT.The bottom line is the M6 does what a coin & jewelry machine should do with simplicity, performance and depth with a great ground tracking system without all the complicated programing of the XLT and the DFX.
EDITED 6-19-06 (My MISTAKE) the Indian Head I listed as a 1910 was a 1902 I got it confused with a different coin.
Take Care Everyone,
Bill G