If you haven't already, you might check out Simon's thread on Zebralights -
viewtopic.php?f=27&t=21994.
I have quite a few torches and earlier this year I also did a group buy for some friends for a few Xtar and Olight single AA/14500 torches. The Olight model I got was the S15R that comes with a rechargeable 14500 battery and a rechargeable dock. It also takes AA batteries although AA batteries won't charge with the charging dock, only 14500 lithium batteries. The Olight came with what I call a "reverse" belt clip, which I didn't like at the start, but found it can be clipped to a cap so can act as a default cap light, so I don't mind it so much now.
There are quite a few single AA type torches out there from a whole range of manufacturers like Nitecore (EA11, Sens AA), Fenix, Olight, Xtar etc. I was tempted to pick up a Klarus Mi7 AA I saw on a torch forum recently - a guy had discounted prices on it for preorders.
I still like Zebralights though.