What are your guys opions on different car stereo brands? I want to get a good amp and good subs for a good price. What do you guys think about all the different brands like Sony, Kenwood, Panasonic, Alpine, Kicker, Audiobahn, and others? Do you think some suck like Sony? Do you think some are over priced like Alpine? Please help me out to find something that I can get fairly inexpensively and upgrade (1 sub + 1 amp now) 2 more later.