USB drive vs NAS for storage/streaming/back-up

Stevenstone is right - get the computer hardware out of your listening room. Assuming you have your wireless router in a closet somewhere, get a cheap NAS and put it in there with it (I spent all of $225 on mine).

One of the main benefits of Sonos is that all the "work" of de-compressing the file and turning it into a digital stream is done in the Sonos box itself. Since file transferring across even the cheapest network device already has more error correction than the best CD transport, you don't have to spend a lot on this. Buy cheap and spend the saved money on a backup drive (or a nicer DAC!).

Enjoy!

Additional tweak to your Cullen modded Sonos; get a decent power cable such as the PS Audio Power Punch and you will see further elimination of the grainyness of the Sonos digital out as well as increased dynamics across the board typical in a power cord update.

the scuttle I hear on the sonos message boards is support for volume normalization metadata standards (there are 2 competing standards) and possible multiple library support (i.e. you could have a "classical" library, a "jazz" library, etc). They don't talk about any plans themselves, these are all speculation on the part of users supposedly "in the know" - for whatever that is worth.

Given their latest modifications were almost strictly aimed at the computer/wi-fi side of things, I'm guessing they aren't too concerned with the audiophile grumblings for high resolution and better clock circuitry. Their business model doesn't really cater too much to our needs, but the library size thing should be a universal problem that gets addressed. The other thing I would look for is a new controller that looks & acts like the iTouch/iPhone model.

Long term, I'm hoping one (several?) of the higher end equipment manufacturers like PS Audio will pick up on the Sonos delivery model and offer a product engineered towards us.