I currently use the Wolf-Eyes Charger/battery config. and i must say that for the 5 months i have used it, it has run great. I have been using them with both the Cree Drop in with my 6A, my 6M, my M90 Rattlesnake, and my new 13v M90. none of them have experienced any failures yet even with the fairly large amp. draws using the incan. I personally feel that the 168A from Wolf-Eyes is a great setup although if you do have other 2 CR123A flashlights you may want to buy the 168B batteries, it will work with most 2 CR123a cell lights including most of the surefires. Though keep in mind that the 168B will have less runtime than the 168A since its size in diameter is also smaller. (2200mah vs. 1500mah)
Dont forget to use your CPF discount at PTS if you order from there.