TV and Nav 2 Go more reasonable. I found out AFTER sending mine to Nav TV! (Doh) Pulled it Monday & Overnighted it, they added two video inputs and sent it back Same Day! Got it back Wednesday & was stylin' by Thursday! Check with the Vendors on this site about TV and Nav 2 Go.
BTW I LOVE having my rear dvd feed the front unit, and my back up camera mounted in the FRONT air dam. It's really helpful for parking. It's fun to watch at speed, and I ran a feed into the armrest to hook up to a camcorder. No regrets!!!