Hiya folks! I'm in the market for a new battery for my '02 Toyota Celica. The 2 most important stats to look for in a battery, from what I understand, is the CCA and RC. What I don't know is. . . what is the standard number for those (CCA & RC)? I don't know if I should get one with a 640 or 550 CCA, and is 90 mins of RC decent? I live in Michigan so winters can get a bit nippy so I need some input as to what number of CCA and/or RC I need to look at. Thanks in advance.