Hi Monte,
I have all of the M6 coils, but use the small coil 99% of the time. This is my primary machine.
Generally, I hunt only the places no one else will touch. For example, gravel parking lots littered with pull tabs, twist off caps, pieces of fence wire, can slaw, and tin foil wrappers. Or an old home site littered with a hundred year's of junk and nails. I have lost interest in the areas where there is competition for slim pickings. In my area, there are too many people looking for gold rings who know nothing about the hobby and filling their holes.
The machines you suggested:
The XLT (I've had) did not seem to out perform the M6 for exceedingly trashy locations. But, perhaps I can't get it set up correctly.
The MXT (I've had ) is a warmed over M6 and I get comparable results. The M6 seems a bit more stable, but that's just my thought.
What I need, after detecting a five acre parking lot with the M6, a machine which can go behind the M6 and find what it missed. My current group can't do it. Possibly, nothing is better at this time, at a reasonable price. I had hopes the 6T (at a different frequency) would work, but from your comments I sort of doubt it.
Which suggest a mid-level Minelab or saving up for a high dollar machine.
My luck with used machines is marginal and I'd rather stay with new machines.
Your thoughts are appreciate. I am getting the feeling there is nothing better then the M6 for what I am doing.
Thanks, Roper