I'd take a look at the Micro 90 or the TRL 3. I've seen the TRL 3 and didn't think it was a bad piece, although I'm not as fond of the TRL switches as I am of the switches on the Surefire. The Micro 90's supposed to have momentary switches and I'm thinking about placing an order for one to give it a run-down.

Now... if the concealment holster industry can create a really slim design that enhances the compact light features without feeling like you're carrying a piece of Samsonite on your hip/....