Stereo & Electronics - Pioneer DEH-P4100UB

Anyone have this head unit? I'm thinking of upgrading! I tried installing my old DEH-P3600 and well it's too deep for one, two the only thinking I could do for radio controls would be that IR sensor and I've read SOOO many bad things about them.

I'm kinda a Pioneer Fan Boy, although I'm also Looking at a Sony Xplod MEX-BT2700.

Any thought's? Anyone have either of these?