welcome, have you got satnav, if not look at the android one, it can get quite costly to get an aftermarket head unit in, think the fascia adapter is somet like 180 quid, the android one is oem style so it repleaces original head unit without needing a aftermarket fascia, sheppy has said it imporved his sound quality , i think it also adds rca
http://www.iceboxauto.com/vauxhall-opel-...id-44-m072
http://www.caraudiodirect.co.uk/ctkvx01-...lation-kit
heres the double din for aftermarket head units, bear in mind you have the cost of the head unit on top, shame the android cant have dab but as long as you have decent amount of data on yoour phone then your ok
http://www.iceboxauto.com/vauxhall-opel-...id-44-m072
http://www.caraudiodirect.co.uk/ctkvx01-...lation-kit
heres the double din for aftermarket head units, bear in mind you have the cost of the head unit on top, shame the android cant have dab but as long as you have decent amount of data on yoour phone then your ok