Which Optima yellow top?

I need a new batter and was thinking about getting the Optima yellow top but saw two different version online: D34/78 and D75/25.

The latter one has less CCA's and some other lesser specs which I'm not that worried about, but there seems to be slight difference in the size, too.

http://www.optimabatteries.com/publish/optima/americas0/en/config/product_info/automotive/deep_cycle/technical_specs.html

Which one should I choose? Seems like there is also about $30-$50 difference in price, but this time that is probably not going to be the deciding factor. I just want a really good battery, which I figure Optima is.

i used to work with them alot when i installed car systems,

it really all depends on what u want one, some stock alternators wont evan charge them fully (according to the interstate guy never tested it myself)

do u have a system if so what size amp and power wire? any mods that require large bursts of amps from the charging system?


Don

The stereo system includes two Kenwood amps (800W + 640W) but I don't remember the sizr of the power wire. It's pretty big, though.

It's not really a matter of whether I'm going to get the yellow or red, but it's more a matter of which of the yellow models I should get

The series 75 fits just fine in my car. Probably will in yours, too. Why not just check the chart?