I'm looking into diving into the tube amp world for my HD650s (probably either Bottlehead Crack + Speedball or Schiit Valhalla 2). Currently I mostly use my iPod Classic (5.5 gen) with Rockbox serving up FLAC hooked into an O2 and it has served me well, but I would like to have something where I can stream from my PLEX server (lossless obviously) and not have to deal with keeping the iPod up to date. What are my options? Could I just use an old Android tablet that I have and get a DAC? I've seen some "music streamers" but they seem pricey for what they are.