batteries - what the F do you know about them?

[Maengelito]

so it seems as though my STi's battery is on its last leg. it has a hard time cranking especially when its colder outside. subaru batteries are not known for their longevity and its coming up on 3 years old (most batteries i've dealt with have a life of 3 to 5 years). but with my 'bumpin' system (y0!), i expected it to crap out sooner than later.

so with that being said, i will probably buy one of those autozone/pepboys/advance/sears batteries with a 3 year warranty. this is your chance to talk me out of it for various reasons like cold cranking amps, lightweight, etc.

so lets hear what you have to say.