No. You can lace a 26" rim to a Campy hub just as well as you could to a Shimano hub. Unless you're set on buying a factory wheel. In which case you could have all-Campy except for the cassette and hub and use the Jtek (my setup) Getting the adaptor threaded in correctly is a little finicky, and it's probably not as good as going all-in with one manufacturer, but it does work.