NAS is not a server. Total different things. Unless is a really powerful, with a strong processor and enough RAM.
I would second Innuos here. ZEN and higher if you can afford them. Innuos is a one-box solution: server, streamer, CD ripper, storage
As for streamer, take a look at these two brands: (1) Sonore, and (2) SOtM. They have solutions for all kind of budgets. Sonore microRendu (now discontented) can be found for less than $300 (you need a DC power supply), and SOtM sMS-300 in around that price range. They of course have higher priced / higher performance models, like opticalRendu or SOtM sMS Ultra Neo
I would second Innuos here. ZEN and higher if you can afford them. Innuos is a one-box solution: server, streamer, CD ripper, storage
As for streamer, take a look at these two brands: (1) Sonore, and (2) SOtM. They have solutions for all kind of budgets. Sonore microRendu (now discontented) can be found for less than $300 (you need a DC power supply), and SOtM sMS-300 in around that price range. They of course have higher priced / higher performance models, like opticalRendu or SOtM sMS Ultra Neo