I asked my fiancee for an Inova X5T for christmas- I have a REALLLLYYY good chance of getting it
I also will be getting a Surefire M2 (maybe another model, but I am mostly sure about the M2) sometime soon.
I decided on the Surefire because I want a powerful light that will be freakin' bright up close, as well as have the power to illuminate things at a distance. This will be a light to carry when the sun goes down, to use in a self defense situation if need be (light as a force tool), to light up the paths I walk on at night around here, etc.
Since the Surefire takes lithium batteries, it only mades sense to get an Inova for 2 reasons:
1) Inova is a better EDC light for daylight chores: lighting up the area behind a tv, a computer, and other nooks and crannies. Small, portable, powerful
2) The Inova will use dead batteries from a Surefire.
So, that is why I have decided on these lights. I don't know if it helps in your decision, but it may be informative nonetheless.
I would go lurk on candlepowerforums, though, and check out the mods some of those guys do. The 5w luxeon mods for 2D cell mag lighs are awesome by the looks of things! And the green 5W luxeon mod for the Surefire M2 must be alien technology... there is no ther explanation for it!
P.S., I have a min-mag that is dead (didn't work well after many years, I took it apart... oops!) and a Super Pelilight. THey are cool lights, for sure. Cheap and batteries are cheap. But I am looking forward to powerful light and flawless beams. I have decided that quality of light for my uses is worth the higher battery price.