seriously man, this much detailed info- join an online forum.
diymobileaudio
mp3car
12volt
you're looking at a half hr conversation. do your research and narrow down a few brands. You'll appreciate it more. NO ONE can tell you what's right as your acoustic ear is different than mine. and specify the music u mainly listen to, that's crucial. Hit up a few stores and start listening to speakers. a pair of memphis may sound great to me and sh!tty to u. and from the way u are diving in, go ported. and you'll need a new upgraded battery from a pro audio place to run that much CONTINUOUS power. Capacitors may help but are are for deep bass notes every so often- they do not hold a charge too long. U have a lot of research to do and will appreciate it all more.