I'm actually very happy with my Seagate 3TB Personal Cloud storage NAS. It does what I need it to do (music to most any device in my house) plus I can access all my music from any internet connected device away from home. All for <$100.
Been forever since I've posted on ts.com, esp outside of the CO Crue thread, but slow day at work and I just came across this.
Wish I had seen this a couple months ago which would have helped me find things quicker, but like Chuck I got the Seagate Personal Cloud 3TB. I had beers with Phil R recently and he went a similar route, but went with the WD My Cloud.
I'm using Plex (for NAS) which is basically free to stream/organize music. Plex has NAS software for a number of drive brands including the Personal Cloud, My Cloud and Synology and Buffalo drives.
The critical piece I finally found to replace my aging Squeezeboxes is the relatively new Google Chromecast Audio. I totally love it. Basically the same I guess as a regular Chromecast and many people might prefer that, but the Chromecast Audio doesn't need a TV for an interface. You can stream/cast to it using a pc/mac, android phone or iOS iphone or ipad. Lots of apps work with it, including Plex as well as spotify, rhaposody, etc.
No need for having the TV running to manage your audio, control directly with your phone or tablet. Guess I'm the opposite of Chuck, but I hate having to manage my music playback through a TV -- just don't like having to have a TV on so I can listen to music.
Among the good things about the Chromecast Audio is that it has bit perfect digital (optical) output (or analog out via 1/8" mini), and you can buy multiple units to support multi-room audio. It supports 24/44 or 24/48 flacs bit perfect (with upsampling to 88 or 96), and can also play mp3's, 16bit wavs, etc. $35 each too, so way cheaper than Sonos.
I'm using mine with a Musical Fidelity DAC into my playback system. Beyond using Spotify, I've got the music collection on the Seagate Personal Cloud in the AV closet attached to my DLink router. The drive has the Plex server software on it, so I can play the music on the NAS via wifi (intranet) on my macbook or ipad via the Plex app, or I can play it on my main stereo via the Chromecast Audio. Use my ipad or iphone as a control interface, play the music off the Personal Cloud NAS, and cast it to the Chromecast, and feed it to the MF DAC so I've got good digital>analog conversion. Excellent playback quality and flexibility, and the Chromecast Audio has way more support for 3rd party apps than the dated squeezebox.
Right now I've got only one Chromecast Audio to feed my upstairs playback system or the multi-room whole home audio system (both amps in my AV closet). I'll probably get a second one for the downstairs playback systems as well, maybe get a third for the office playback.