Buy a Optima red top or yellow for front battery and get a shrukien 950 amp battery for the amp. I have a nasty set-up and and blast my system and never have any light dimming problems. Power caps are a waste of space, extra batterys are the key to having enough power to slam your ride to the max. Audio America has some good deals especialy if you know someone who works there then you get everything at dealer price. The hell with paying for retail. Good luck on your battery hunting.