New battery...suggestions?

Does anyone know any good small battery that will fit in a P11......I need a good reliable one cuz i got an audio system in my car. I was thinking of getting optima battery.......I want something that don't need any modification to the battery tray or drill any holes...Anyone swap battery yet to their P11?? Share the knowledge...

I'd recommend the Optima if you have a system in your car. I think the yellow tops are the good ones for stereos. I have a red top in my p10 and didn't need to do anything special for it to fit.

Red Top Optima should work fine. No modification needed. $110-130

thanks.

This may sound stupid, but check out pep boys. I picked up my dual post red top for under $100 there. I got sort of a hook up on the battery (they screwed up). But i think normally they were only like $110 or something like that, maybe a tad more for the dual post, i forget. But, I do know they were a TON cheaper there, then anywhere else in Phoenix.