I'm planning on having some new wheels handbuilt for incoming bike, Open Pros laced to some sort of Campy hub. The rest of the bike will probably be Veloce (similar to Centaur, but more affordable; I can live with the minute weight gain). According to the Campy website, the Centaur and Veloce hubs are equivalent in weight, and the only difference in description is that Centaur has "one-piece light alloy freewheel body" while Veloce says "light alloy freewheel body." The Chorus/Record hubs are significantly lighter.
My question is: is the difference of 134 grams worth the extra expense? Will the Chorus/Record hubs roll smoother/last longer/etc?