PC for Cambride Audio 840C?

Recently finished revamping my amp/speaker combo and now need one extra power cord. Currently, I have my 840C connected with a Shunyata Venom 3 and have been pleased with it but am wondering about something...better. Most people say that the most noticeable difference with PC's is at the source, so I have decided to try it out on my cdp first.

Trying to keep it under $250, used. As always, the cheaper, the better. Any suggestions?