Exact Power EP15A/SP15A vs. PS Audio Power Plants

Okay... Trying to get a GOOD power conditioner/regenerator here. Heard that PS Audio P-600 is a wonderful piece. $1400 used, built like a tank, very good deals all around... Then I saw a lot Exact Power ads hanging around claiming that it buries, kills, out-performed the P-600 Power Plants, Power Snakes Hydra, Tice, Richard Gray.... Never realy heard about Exact Power before, and I had a hard time trying to look for reviews regarding the SP15A/EP15A. Have anybody own an Exact Power SP15A/EP15A or a PS Audio P-600? How is the performance with these two units? What are the good and bad, pro and con... How is it when they are compared to each other? I am trying to buy the best power conditioner/regenerator without regreting...