How much do you wanna spend??????
Id go with Alpine for the head unit, find one in your price range.
As for subs, Id go with some Image Dyanamics subs( ID or IDQ series) or maybe some JL W3s. Most likely in sealed enclosures, if your looking for mostly sound quality. A single subs set up would work well too, maybe an Adire Audio Brahma, Image Dynamics IDMAX, or maybe a W7.
For amps, Id go with ARC audio(their KAR series is not that expensive), JL amps,or Orion(awesome amps). To keep it simple you could get the Memphis Audio Memphis Belle. 5 channel amp the has a 1000 watt sub channel.
MB Quart, CDT, Image Dynamics(chameleons are fairly cheap), or maybe some Phoenix Gold Titanium Elites. Those would be my choice for mids and tweets. A two way or three way component set will give you the best sound, I wouldnt go with any coaxials. And please run your mids and highs off an amp. You'll thank your self.
It all depends on how much you wanna spend, heres some links to some online retailers
http://www.thezeb.comhttp://www.sounddo ... ersetc.com