Thunderbolt is a super fast USB type connection. A NAS that has a Thunderbolt i/o isn't going to be of any benefit on a ethernet network, which is how it will be used to support a Sonos system.. As for USB 3.0 Dac's none yet that I know of..
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.