After installing dedicated AC lines, I ditched the power conditioners, but threw a PS Audio Ultimate Outlet on each line (with the 20A high current version for the amps), and a third one for the TV and VCR (on an existing, non-dedicated line), and I am very happy with the results. Interestingly, it was my 20+ year old (but high end, for the time) television that received the most noticeable benefit from the UO's.
Tom.
Tom.