Alright. here's what I suggest, I think you'll be very happy.
Front components Alpine SPX-177r 230 shipped
OR you can go the DIY route and save money and get better results. This would require a good headunit such as the Pioneer DEH-P860MP(330 or so shipped) or a highend CD player with a flexible 3 way crossover.
For the mid get the Seas CA18RNX (H1215) 7"
http://www.madisound.com/cgi-bin/ind...mageField.y=10
With the LPG 25NFA Silk dome tweets
http://www.madisound.com/cgi-bin/ind....16415&pid=635
This combo will cost you about 150 bucks but will blow away most anything in the price range of 200-400 dollars. And will put those Kappa Perfects to shame.
http://www.diymobileaudio.com/forum/viewtopic.php?t=73
Then get a 4 channel amp to power this set of speakers.
Elemental Designs Nine.4
http://edesignaudio.com/product.php?...pid=10&cur=USD
185 with the forum discount
http://www.edesignaudio.com/forum_discount.php
http://cgi.ebay.com/ws/eBayISAPI.dll...974264283&rd=1
That would be an awesome deal if you can get it under 300. 1200 watts of class a/b power (retail is 625)
Or if you prefer to go with more efficient power the eD nine.1 does over1200 watts rms @ 1 ohm. It's a class d though, the DLS will sound better, but drain more on the electrical system.
For subs I would go with two Ascendant Audio 12's or 15's, they're onlt 100 bucks each right now and have XBL^2 motors, which are supposed to give very good SQ.
2 atlas 15's with a DLS A6 would be so awesome.
www.ascendantaudio.com
So to recap, this is what I would do DEHP-860MP, Seas CA18RNX with LPG tweets, Elelmental Design Nine.4, DLS A6 for subs, 2 Ascendant Audio Atlas. That's about 1200 bucks. If you can't get that DLS A6, I can get a new one for around 420-450.