I might be the a$$hole for this...what's the goal? Audio related? Why do you need to upgrade your system? Need more voltage?

If you can't figure out why you need "big 3" upgrade...chances are you DON'T need it. Big 3 really doesn't help anything with a stock alternator to be honest.

FYI, My a/b amps can push ~2000 watts total if needed. I don't have a Big 3 upgrade and no issues with dimming lights.