About 6 months ago I bought a SureFire 6P that cost me 42 bucks shipped with batts, and I installed a $16 R2 bulb from DX. I am very happy with the light and the mod but I was wondering how much of an improvement the new lights are over what I already have. I like simple on/off lights with no other modes and don't want to spend much more than what I have invested in my SureFire. Any recommendations?