AVIC D3X would be my choice, I looked into doing a double DIN conversion to my Z06 (stock is DIN and 1/2) but since I hardly drive the car I have decided against it. I looked at units and for the money this unit seemed to be the best one, I have 3 friends running this unit (1 in a H2 and 2 in Escalades) and they are all very happy with them.
Good Luck whichever way you decide to go
