You'll be amazed at the variety of cars in Carbon!
http://www.nfs-planet.de/nfsc_cars.php?lang=eng
Edit: Also note that the graphics have improved a considerably large amount.
Edit: And just a little something to get you excited...Audi Le Mans Concept, Alfa Romeo Brera, '70 Chevy Chevelle, '67 Shelby Mustang GT500...is that enough?