I'm looking at the new streaming and network music technology as an option for going beyond 16bit 44.1KHz CD audio. I would like a device that can deliver an unbalanced analog line in to my amp via plain old RCA connectors. I've looked at a variety of devices such as Squeezebox, Sonos, Cambridge Audio NP30, Arcam rDAC. I can see a all sorts of ways that this might be achieve by plugging together various technologies. The NP30 has a USB socket on it and can apparently play files from a memory stick, and also has a display for selecting them so it might fit the bill. The rDAC also has a USB input and can play hires files from that. But it has no way to select which files to play. Neither of them can do so when streaming directly to them. If I were to add a NAS device and connect it to the rDAC via USB then maybe use software on a phone to tell the NAS what to play. Has anyone done this and how did they do it?