I have a replica competition pro that is USB. I have had ti a while and love it as it is solid and reliable.
I have two of them and they are pretty decent. That being said: The USB-Interface of the Competition introduces some small lag (not noticable per se, but if you add the lag of the emulator it can give you a little strange feeling). Catweasel is definitely faster, but doesn't work with any 64 Bit OS - nobody ported the drivers.
Furthermore Competition Pro 5000 from the 80s are just a little bit better in terms of stability and reliability.
