i just bought a Litespeed Toreno, and it's Ti. yeah i could feel a little difference between that and some of the carbon bikes i tried...a little smoother, less buzzy in the road noise. but i'm not sure if that was the rims or not. mostly i bought it because it was like jewelry. you want plastic jewelry or you want precious metals? i went with the shiny one.

(ok it wasn't quite that moronic of a decision making process. the full ultegra whereas all the carbon bikes mixed 105 with ultegra had something to do with too. a little bit. sort of.)