I just ordered a Nitecore MH2A. I like the idea of a double AA battery sized rechargeable light. It was on sale as well, so I only payed a small price for it.
Triple Quad XP-L X40Vn.
Why? 3x4 XP-L = 12 XP-L emitters in a mid-sized light. Now that's the sort of arithmetics that a flashaholic loves!
My collection would've already been alot bigger if it weren't for the money issues those light cause x'D