Edit:
Just realized you wanted for your pistol, below won't apply sorry
Fenix PD35
Has an optional remote-switch
Incredibly bright for the price
5intensity
Strobe meant to disorient
Dedicated button to switch modes: no more semi-pressing the tail-cap or something
Waterproof for real (not "Chinese" waterproof)
200 meters throw
Currently in special from the look of it
http://www.fenixoutfitters.com/fenix...ight-2014-edt/