Just remembered I have an unused Chieftec Dragon case. I could just use that to transfer the NAS to then buy a new PSU for HTPC. Updated.
Route #4: Build NAS + reuse HTPC's PSU and a different case. Buy new PSU for HTPC.
CPU: AMD A4-3300 2.5GHz Dual-Core Processor ($41.24 @ Amazon)
Motherboard: ASRock A55M-HVS Micro ATX FM1 Motherboard ($47.97 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory ($29.99 @ Newegg)
Total: $119.20 (added these to Christmas list )
Plus a ~$25 PSU or something for HTPC.
Edited by AZNguyen, 29 November 2012 - 01:54 PM.