The Aurender N20 is by far the best streamer you can buy! If you're on a budget, you can go with one of those cheap ones, or you could just install Roon.
Streaming recommendations
I am looking to add a streamer to my home system. I want to connect it to my Emotiva ERC-4 via the TOSlink. I would control the device via my Fire tablet or iPad 3 (both are pretty good with my Visio Smart TVs.) or my android phone. What is a good unit that is budget friendly?