I just bought one for my car (last was stolen) and after doing all my research, i landed on the avic z2. Its nice because it was manufactured in 2007 so its not too old, fat 7" screen, and the nav system is supposed to be pretty nice. The other one i was looking at was the f900bt or the f90bt, but the problem is people are saying they are buggy and take minutes to load up from start. That and i dont really care for the interface. The z series also has a 30gb hdd in so you dont have to mess with map discs and such. Got it on ebay for less than 800 with the remaining 2 years of a best buy warranty. Just keep your eye open for the one you want, dont settle for the quickest one, especially if you are buying used.