Congratulations. I think that you will love the M3. It has tremendous output, is not ugly (like my wife says) it is tremendous looking and it is very adaptable to many different situations especially with a turbohead.
Don't forget that you can run it off of 2 x 17500 rechargeables. The output is a little less, but the lumens are guilt free.
It really is too bad, though, that you picked it up right before Surefire released the fully regulated version; you can read about it
here.
-Goatee