Campy ARE very nice, and high quality....but expensive. What are they worth? Very subjective. If you go with Campy BB, are you going with Campy crankset as well? One must match the taper of the spindle to the taper of the crankset. Threads on spindle....some spindles mount the crank with a bolt, some mount them with a nut....simple as that, no big difference to the crank, just the mounting bit. KNOW your spindle length needed and the type of threads of the BB, is it French Threading? Swiss? British?