I received my Supfire M6 today. It came with XM=L2 leds in it. I made a little video of my initial thoughts, as well as a very few beam shots.
http://www.youtube.com/embed/qYD0yGqqbgY
Here's the beam shots;
High
Medium
Low
High
Medium
Low
Overall: A very well made light, that's bright enough in stock form, for most people, at an affordable price. Close to 7.5 amp draw on High. That's fairly Good for a stock light.
What I don't like: No mode memory, low mode is too bright, very front heavy - most of the weight is in the head, causing it to feel like it's going to slip right out of your hand, finish is too slick.
Nice video OL! Got my M6 this week, with XM-L2's. I used a Powerizer to do a tailcap reading and got 7.75A solid, and when running on 4 KP 3400's, in the lightbox I measured 2,655 lumens OTF at 30 secs, which is a whole lot better than most that are 1,800 - 2,200 stock. These #'s confirm what you see.