Hi,
I find that in these forums - that is WAAY to general of a question to ask.
You might want to narrow it down by battery type for starters. How much you want to spend is another question.
I'm kinda in the same boat - I'm looking for a high-powered 1xAAA powered with NiMH batteries. And even in that category, you can have many opinions on whether you want a TRUE keychain light to go on your keychain or just an EDC(Every Day Carry) light that you can keep in your pocket. I'm in the latter category myself..
So far, I'm heavily leaning toward the Liteflux LF2x. It offers customizable settings so you can either have a very low 'low-setting' or a very high 'high-setting' or anywhere between them. But it's anywhere from $52-$60, depending on which site you look at.
(SIGH) - no question regarding a flashlight is simple here. :laughing: