I think I know the answer but I thought I'd ask anyway. I want to buy a 10 speed 13-29 cassette and can choose to spend about $70 on a Veloce, $110 on a Centaur, and $130 on a Chorus. My question is are there any significant weight, quality or performance differences between them? Some of you guys know a lot more about Campy than I do. Thanks guys.