Lot's of choices here. I've tried Fenix and 5.11 lights, both with less than satisfactory results. I have several models of Surefire, and all have been flawless. My favorites are the EB1, the P2X Fury, and the E2D Defender. They're all pricey, but top quality. They do have some less expensive lights, like the G2X, that also perform quite well.