I am about to purchase a C-MAX SEL. I was wondering what the difference between the SYNC w/MFT (which is standard) and the SYNC w/MFT with NAV and Sony audio. Specifically will the album artwork when playing my iPod still show up on the screen if I just get the SYNC w/MFT (standard) or do I need to get the NAV, SONY sound upgrade? (Also, any comments on the Sony sound upgrade would be appreciated.) Thanks.