I know the Z1 doesnt come with any DVDs for the navi ( well I didnt see any in the box, and figured since the z1 so advanced they would have it built in) My question is how easy is going to be to update the navi if needed, and where would one be able to get the navi update, from pioneer or burned copied disc like the other avic's from ebay or elsewhere?

there aren't disks for the nav...it's on the hdd. from what i've heard, updates will be uploaded via dvd onto the unit's hdd to replace old info.