FNG, if I may interject:
The 9's are great lights. Don't let me talk you out of them if you really want one. I just want to share my opinion. I have the 9N and 9AN. I also have two C3+M2's and an M3T running Li-Ion. The 9's are much longer, thicker, and heavier. Plus, the M3 is shock-isolated-- the 9AN is not.
All in all, I prefer the Li-Ions, mainly because they are smaller and lighter, and I can switch to 123 power if the rechargeables empty in the field.
Just my $.02