i'm a AVIC D3 owner thats been thinking of upgrading to a Z3 or Z4 if it comes out. do u think this is a good upgrade from the D3?
also i've herd that theres a guy on here that sells the HDD for the unit. what exatly is this? is the firmware and nivagation maps on that drive freeing up the cd/dvd drive? also can i send this guy ANY sized hardrive say 120gb for him to put on whatever navigation firmware so i can replace that with my ipod?