Ive been looking at a lot of single DIN aftermarket nav systems and must say it looks like factory is Not the way to go. You can get a very decent single DIN navi system for $1500 or so with included radio, cd, and for a bit more money dvd.

Ive also been looking at the old Clarion AutoPC, fascinating device.

__________________
2007 Corvette Convertible Torch Red
1996 MBz SL500
2008 Harley Davidson Night Rod Special