The Alpine is nice for the money, but the tuner i believe is non RDS. Also the bluetooth interface is around £100, so the Pioneer wins those 2 points. Depends what you need really.
I would have a Alpine unit, but TBH not that one.

This is the one i have

http://www.caraudiodirect.co.uk/alpi...0r-p-6422.html

It connectsto to a USB memory stick so straight away you can have at least 8gbs of music
and still play cds in mp3 format. Looks far better in the flesh, and is a very good unit.