Suggestions for a PC on my PS Audio Duet

I have a ATI multi channel amp that I plug directly into a dedicated 20 amp service. I have a Jolida 100 cdp (tubes), ADA prosessor, pioneer Blu-ray that are connected to my PS Audio Duet. What would the people of this forum suggest as a reasonably priced PC. Also any suggestions on a PC on my ATI multi channel which is plugged into an PS Audio Soloist. I listen to jazz on mostly 2 channel. Any input would be greatly appreciated.