I'm also a fan of the M 6.0. I also really like the old Bio 600 Tour. I think they are the sleepers of the Dunlop line up. Both are fast, have decent pop and feel way more solid than they should -- I think the stiff beam helps there. Spin is very impressive and I enjoy how I can really move the ball around the court and find good angles. Ideally, some weight under the grip and a smidgen at 10 & 2 would totally dial it in for me.
I just got off court hitting a bunch of different racquets, including the M 6.0, and even though it had a string in it I don't particularly care for, it still felt good.