holy crap u need to stop churning out so much Win!
some points, even tho you probably wont re-render this out, unless u did it in layers =p
-reflected light from floor into the rims, a more specular look
-added white text around the rubber
-cars reflection into the floor (wel at least a little orange on the floor)
did u use Vray?
keep up the good work ill be askin for some tips when i comp my sniper rifle into a scene =p