new car system, your thoughts

I would like to know your opinions on the items im picking, and what you think I should get. what i'm trying to get is quality, but also a decent amount of power, it's a small car. so this should all be more than enough. current system - -eclipse EA 4000 50x4 watts at 4ohm's http://www.eclipse-web.com/us/amp/ea4000.html -polk 2 way's 190 max, 75 watt RMS 2 way's x 4 http://www......com/item_9111_Polk+Audio+db651.html -10" MTX thunder 4500 250 rms enclosed in a seal box [url]http://www......com/item_8293_MTX+Audio+T4512-04.html[/url] -kicker zx200.2 200 watts rms at 4 ohm's(blew) http://www......com/item_11542_Kicker+08ZX200.2.html this is what i'm looking at put into my car alright I think ima change up them parts completly to these - http://www......com/item_7254_JL+Audio+12W3v3-2.html http://www......com/item_8515_Kenwood+KAC-9103D.html http://www......com/item_12260_JBL+P660C.html http://www......com/item_12266_JBL+P662.html http://www......com/item_12053_Kenwood+eXcelon+KAC-X4R.html I really like the 4 channel kenwood amp, looks really flashy lol, good access to controls and i guess it comes with some extra bells and whisles. puts out 150rms at 2ohm's I was gonna get the infinity kappa's but when i listened to em they sounded to tingy to me, really bright highs, I would think jbl would have some better mid range that wouldn't be so easily overpowered by the highs. anyone got any other thoughts on that and the other parts I've selected? also probably gonna build my own box. as far as the box, i've been told tuning it to 28herz and building a solid unported seal box is best for the responsiveness of metal and rock. i listen to alota indie, rock, emo, punk, metal, sometimes popy stuff when bored, I like my system to have alota veration built into it so i can listen to what ever im in the mood for.