Any decent 9-speed (or 10-speed for that matter) KMC, Shimano, SRAM or Wipperman chain will work fine on your bike and all but the Shimano include an easy to use master link for joining. There is no reason to go to the expense and installation difficulty of using a Campy chain.

I've used Wipperman and Shimano chains on otherwise all-Campy 10-speed drivetrains with excellent results for both shifting and durability.