When the funds are available, go for the P5 or P10. Earlier generations of the PS Audio regenerators were infantile compared to the newest units. Not faulting the PS folks as they were aiming to revolutionize the way power is delivered to our audio systems. The early units were too inefficient and served as space heaters, only able to provide regenerated power to the front end components.
The Premier Power Plant solved, in large part, the efficiency issue and ran much cooler. It's issue was questionable Chinese build quality, as these units were notoriously unreliable.
The P5 and P10 both employ much more sophisticated circuitry and are hand assembled in Boulder where quality control is vastly improved. Even though the PPP was supposed to be able to handle my power amp., when I tried it, the regenerator shut down and I had to get a new unit.
I was assured by PS tech. support that the P5 would easily handle my entire 2 channel system and so it does! With SACD player and its outboard power supply, line stage, phono preamp and outboard supply and power amp all feeding off the P5, I am only using 35% of the unit's capacity!
The biggest rub against regenerators was that if you ran your power amp. off of one, your system would suffer dynamically. Not so any more. After A/Bing my amp being fed by a Duet conditioner and the P5 regenerator, the regenerated power allows for greater dynamic swing and more impactful bass response.
