Sorry can't help with much of the specifics... but for research purposes.... www.crutchfield.com can be a great place to look for new parts and get a good rundown on specs and tech sheet info for the new parts.

Most of the time I'll look it up on Crutchfield... then goto google or some other reputable car audio site and compare prices. Crutchfield sometimes has the better price, but lots of times you can find just what your looking for other places. Just a thought. :P