I just got my 3rd Eagletac in today - a M2CX4 Mk 2 - Really sweet light. It's the newer version with the strobe and other features hidden - so they don't go off on the dial anymore (you must crank it back and forth to get to the strobe and other hidden features).
I also got a diffuser with the light. I will say that it is the furthest throwing light I have now - yet the flood feature is very sweet.
I also have a P20C2 Mk 2 and a T20C2 Mk 2. I think the P20 and the M2 are my 2 fav. The T20C2 Mk 2 throws a bit further than the "P" model - but I really like the combination of the flood and throw better on the "P" model.
Of course, the M2XC4 out does both of them. Great light :)
For those unfamiliar with the lights, both the P20C2 Mk 2 and T20C2 Mk 2 have a turbo mode at 300 actual out the front lumens.
The M2 has the following modes:
Settings: 40 / 150 / 360 / 800 Lumen
4x 123 Run Time: 45 / 9.5 / 3.5 / 1.2 Hours
Runtime (2x18650): 55 / 12.5 / 4.5 / 1.5 Hours