I would try AOIP, sounds better than my previous (many) USB chains. The Rednet 3 is the one I use with my Mac Mini and sounds very liquid and smooth, unlike USB which is edgy and very digital.
Interesting. Rednet 3 appears to be overkill for what I need (a single connection from Macbook Pro to my digital system via AES/EBU or Toslink). Are there other AOIP products that are more limited in scope ...and price?