If you feel comfortable, I would build a "Music Rig" PC. I have built two PC's, one for gaming and one for audio streaming. The price of the gaming rig is way beyond your price point and is totally unnecessary for audio. For audio however, you do not need massive computing power. I picked up an old dead HP Pavilion for $25 including the HDMI monitor (hard drive died). I then purchased a $30 graphics card that had only a heat sink and no fan. Lastly installed 4G of new ram and a Crucial 500Gb SSD and a decent sound card, then loaded Windows 7. This system has only three fans total and is dead silent! You really want a quiet PC. My total layout for this rig came to about $400. I now use it to stream TIDAL exclusively to my DAC via Toslink and to surf at the same time. This solution worked out very well and was light on the wallet. Good luck!
