I use Campy chains except when I'm conducting a chain wear test. Now that I have 11 speed on all of my bikes, Campy is the only choice, at present.
I really prefer Wipperman connex links, but they no longer make one that's a good fit for a Campy chain. They used to make a 10S1 model that was narrower and fit well. I still have a couple of them and even used one with an 11 speed chain.
I've used the KMC missing link on both 10 and 11 speed chains, but haven't logged enough miles on them to say how well I like them. The fit is looser than I like, but they don't make any noise. I tried a Forster superlink model 4 with an 11 speed chain, but it clicked every time it went over the cogs.
From a fit standpoint, a SRAM 10 powerloc should work on a Campy 10 or 11 speed chain, but I've not tried it.