Hello everyone, I thought I'd share my Sonos experience here as it may help someone who is currently experiencing networking problems.
I've owned my Sonos system (2X Play:5 and a bridge) for about three months now and I was starting to become very disillusioned, because whenever I tried to play a lossless audio file from my NAS, Sonos would cut out. I tried every channel configuration and was in contact with Sonos support ever since day one of owning the system. I was just about to give up and put the whole thing on Ebay when something very simple solved all of my problems.
As a last ditch effort, I went out and purchased a long ethernet cable and moved my bridge about 15 or 20 feet away from my router. Voilà! Ever since moving the bridge away from the router, Sonos streams my lossless audio files perfectly! I have not experienced one audio dropout since moving the bridge!
So, if you happen to be experiencing audio dropouts as I was, I strongly suggest moving the bridge as far away from your router as possible. Hopefully this can help someone out there.