I use an Alpine CDA-9847 CD-MP3 with 2 Alpine SPS-100A 4" speakers. It looks and sounds good in the car and works well. It is not overly cluttered with a graphic display as someone said (flying Dolphins). The SPS-100A speakers need a slight modification for installation. The the speaker mounting frame needs to be trimed with a set of sheet metal shears to match the contour of the original speakers (a 10 job).

I got it all from HookedonTronics.com. I do not use rear speakers nor do I feel I need them.

John Roncallo