Wow, yeah IMR all the way for that kind for current. Panasonic makes ICR(same as TrustFire/UltraFire) which is not what you are looking for. Go with just about any IMR battery over ICR for that high of a current.
This battery should serve you well in this case:
AW IMR18650 1600mAh LiMN rechargeable lithium battery
EDIT: Just found an IMR Panasonic. Didn't know they made those