TLR-1 I have a half dozen or so of them. I have trusted my life to them for the last 12 years or so. My duty sidearm currently wears a TLR-1HL. Mine and my wife's home defense handgun also wear a TLR-1.
I will say that no matter what you choose make sure you practice with it in the dark if you are going to use it on a defensive handgun. The biggest problem I see even in law enforcement is that people want to manipulate the toggle switch with their trigger finger and that is not the correct way for obvious reasons.