As highorder said, CPF is the end-all, be-all on flashlight geekery - though it's not all that well organized or easy to find statistical type information there.
The Fenix lights are one of two brands a friend of mine recommends (the other being Surefire). $130 looks like a good price to me.
You might also look at a Streamlight TLR-1 or TLR-2 if you've got limited barrel length to contend with. they'll mount on a standard 1913 rail.
At 220 lumens is bright enough for 100 yards, but something to keep in mind is that it'll likely be difficult to 'spotlight' something at that distance w/o a good tight hotspot @ 25 yards.
Look at the Cree R2 LED stuff is light intensity is a higher requirement (though they do eat batteries). You can get 250+ lumens from them. Like someone else said, reflector size/shape can drastically impact the quality of the hotspot and throw of the light, which is important for such things at that distance.
I'm a fan of the cheaper Ultrafire (etc.) lights and assemblies from DealExtreme.com. You can get lights there for a lot less than from 'name brand' places, and for all intents and purposes, LED stuff is going to be good enough for your applications. They don't suffer from the "not gun-ready" problems that plagued pre-LED lamp fixtures due to the solidstate nature of an LED.
CR123A batteries can get expensive if you use the light all the time/often. If you're going to be running through a set of batteries or so a week, I'd look into getting a lamp that is designed to take 18650 cells, and then get some 2500mAh+ cells and a charger for them. You'll save the cost of the light in no time.
I've got an
Ultrafire C1 Q5 lamp on my mossy 590 with a
pressure switch. The hotspot is tight enough that it serves as a quick aiming device at night for buckshot and the like.
Might I suggest
this light?
There are a bunch of mounting options available for under $25 available from many locations.
