Well I tried WISA when it first came out on the C9 with the WISA dongle, and lets just say I was not impressed. But I might be wrong now, perhaps its gotten much better than at that point?
Preferably would be wired connection, I have seen this Hall wifi streamer thing that should do the job for a reasonable price, but I’m unsure if the sound is any good.
I also have a Beolab 2 I would like to add to the setup, but I guess that would be easy to extend from BL18 power link with both solutions.