Thanks everyone for your thoughtful and quick replies. In the end, having little Apple experience (other than iPOD), I chose the Duet. My plan is to pair it with a VortexBox NAS as this will allow me to run the setup without a PC. In fact, the guys at VortexBox say that if I have no need for more than 2 zones, I don't need the SB receiver at all. (Too late as I already purchased the Duet which has both the Controller and Receiver).
Nevertheless, I appreciate your comments! MW
Nevertheless, I appreciate your comments! MW