I really want the optima, The place that installed the system, can get them, but offers the exact same kind of yellow top in a different brand, for 170. Can I get to all of the wires to upgrade with the big three? Realistically what size wire do I need. I might just be used to my cobra with 4:10 gears, but I am surprised how low this car idles, and the lower rpm's during normal driving. If the alternator puts out 120amps, at 2200rpm, I would almost have to manually shift to keep the rpms up enough. So far now I'm on borrowed time, until after christmas, unless the battery dies sooner. Then I will tell my wife, I need to do it right the first time, and get the optima. chris