Go with the Avic Z-1. Had mine installed after market and all the steering controls work just like stock head unit. It also has 30 of memory and actually stores your cd music like an Ipod. I also got Sirius w/ it and an Ipod cradle that allows you to use the touchscreen of the nav system to operate it. Hooked up a rear view camera and an AV input for PS3. Also has a feed to the rear DVD players so I can control the rear screens from the front. Extremely happy w/ it
