OP, you cannot put a Shimano/Sram cassette on a Campy freehub. You can run an 11-sp Campy cassette though.
If you need something now, take a look at Shimano Ultegra wheels. You can find a set for $300 or so. They're pretty solid, spin great, and are tubeless. They aren't the lightest or widest wheels, but they will work fine.