Good suggestions here...I also like Alpine. The CDA-9887 is a nice unit, still have this one. I currently have the CDA-117 in my car. It only has a high pass x-over though. I'm actually using the x-overs on my amps, so it's no big thing. I have my processor taking care of the PEQ duties, but the HU's PEQ worked nicely when I was using it.
I would also look into ease of use. Pretty important when your driving down the road.