I have a Surefire "Aviator" light, and it's nice and all, but I bought it before the current explosion of super high output LEDs, so its output pales in comparison to what you can get today for much less money.
I also have a Browning "Huntmaster" light, which runs on 3 CR123 lithium batts, and it is awesome! It puts out a searing 500 lumens on high, and something like 250 lumens on "low," which is still plenty for my use. Supposedly, it provides 100 hrs runtime on low. I'd say that's a bit optimistic, but I think batt life is still decent for the output level. The head adjusts for beam width. It's all machined aluminum construction. I've been VERY happy with mine.http://www.browning.com/products/catalog/flashlights/detail.asp?fid=050H&cid=371&tid=1236