Stereo: kenwood or alpine. Kenwood makes really cool looking ones that also creates good quality sound. Alpine has good sound quality too plus all there decks look the same even the relly old one so they wont ecer look out dated
Amp: rockford fosgate all the way dont let anyone else tell you different. They are quality. Build great. The companys been around for a hundred somthig years and they arethe loudest. A 500 watt rockford vs say a 500 watt kenwood would blow it away
Subs: kicker makes a really good sub. They are tight and great sounding. Rockford has great subs too. Theres are used alot for compotitions