I prefer the SureFire...I just don't trust any other brand when it gets down to the important stuff.
If you can get a gen 4 for the same price I would do that as well. The grip is grippier and I prefer the wider mag release.
I always add a 3.5 pound connector and a stainless guide rod. If you haven't tried the guide rod you must. More accurate and follow up shots are much quicker.