As others have said, sony car audio really isn't that great. They call it Xplop for a reason! It took me ages to figure out what head unit I wanted, but in the end decided on a Pioneer DEH-P77MP. You should be able to find one easily enough used for £100, the price I paid for mine. It's a couple of years old, but has a massive amount of features: Impeccable sound quality, regarded as one of the best sounding HU's. IP-Bus, which means you can attach aux in/bluetooth/ipod (being able to control the ipod too)/usb/harddrive/cd changer. Steering wheel control ready. Remote control ready MP3/WMA CDR+CDRW compatable. 6 pre-outs (2 sub, 2 front, 2 back). Great Styling, aluminium front fascia. I'd go for that!