HIDblue
Enlightened
Another vote for the Dereelight C2H with AA extender. Both my wife and I have one (she has a XR-E (either Q5 or R2, can't remember) and I have an XP-G R5). I love the versatility of AA, NiMH, 14500, 123, or R123. Bright on any of them, looks great, and feels nice in the hand.
For ones I don't have, I like the following:
Jetbeam BK135 (really digging this one)
D10 or D11
ITP C9T
+1 on the JB BK135A. I like the UI and the fact that it turns on in high-mode first, then medium, then low. Perfect sequence for my taste.