Hey guys im new here and soon to be a 300C owner. I've ordered a sliver 300C and im trading in my 2003 Escalade EXT. I had a few questions for all the owners of the 300C. I was planning on getting the 300C with out the navi opinion because im plannin to upgrade with aftermarket audio/video. Question is, will a 2 din fit a 300C without the navi opinion? I was planning on getting the Kenwood Excelon 2 din LCD with DVD. I was also planning on adding monitors for the headrest but lookin at the headrest it doesn't seem like you can fit anything over 5.6", does anyone know if vizualogic or anyother company will be coming out with prefitted headrest? My last question is when adding to 22" rims have you guys seen any differences on the engine? And can you put larger wheels like 23's? Thanks and hope to hear some suggestions and comments!