Don't mean to hijack the thread....
but did anyone notice that the red tops have longer warranties (and more cranking amps) than the yellow tops?
Every place I've checked online, oreilly, autozone, sears, even optima's site has about a 1 yr warranty on the yellows & about 3 yrs on the red tops.
Most online auto parts places I've checked are about $159 - $200 for the yellow tops and about $10 to $20 less for the red tops.
Wish there was a costco around here