Can anybody tell me what are the differences (except software) between AVIC-Z1 and AVIC-Z2 ?
I'm trying to figure out what is more cost effective - to buy an AVIC-Z2 (about $1400-1500 on eBay) or to buy an AVIC-Z1 (about $1000 on eBay) and then use upgrade process described on this site and make it Z2.
Any advice ?