I put in a Pioneer 80PRS yesterday. My CD changer has been broken since I obtained the car and it's been lacking, not being able to blast music while driving fast. I went with the 80PRS because it works really well with connecting an iphone/ipod via bluetooth, and it has a 16 band EQ, which may seem excessive but I've done some pro-audio recording in the past so it's a tool that makes me happy to play with. The sound quality is pretty great, though part of me is wanting to put in sub woofers. The other part of me doesn't want to take up any of the trunk space though. The big boon for this system is the full phone functionality.
Overall I'm loving the functionality and the sound. I'd highly recommend this unit.
Apparently there's 210,000 different display variations including a color array, so I'll have to figure out how to program it orange to match the rest of my displays this weekend.