IMO USPS batteries aren't great for car audio since their main design is to put out low current over a long time instead of lots of current draw at one point then bouncing back. We compared 4+ of the big C&D batteries vs 2 D3100's the d3100's were actually louder on the TL after a bunch of testing.
A very good battery you can get for a good price is the Sears Diehard Marine Platinum group 31. It is the EXACT same battery as the Odyssey 2150, Odyssey makes them for Sears. The Odyssey 2150 retails for around 350+, the Diehard retails 250-270 brand new with a 3 year no questions asked warranty.