Hmmm...

1.Pioneer DEH-P7400MP headunit. Lots of features, adjustments and a nice display.

2.Here's a suggestion for a sub / sub amp setup. Ample Audio Exonic 1200 subwoofer / Ample Audio Exonic 580M amplifier. A friend of mine has a setup like this in his car and it sounds great.

3. As far as the rest of the system goes, here's another idea. Ample Audio component set for the front and coax speakers for the rear. All from their Exonic series. Then power all them with the four channel Exonix series amplifier.

4.That should satisfy your audio needs.

5.If you need some more information check out www.ampleaudio.com