I have not tried the Hydra V-Ray.
I have the PS Audio Power Plant Premier and it works very well. Very dynamic, black backgrounds, transparency is great, all the detail and texture is there. The unit is very rugged and very well built. I had to give it at least 300-400 hours before it opened up. Sounds kind of dry at first before break in. It was worth the wait... Also, I think the P3 is much cheaper than the Hydra.
I have the PS Audio Power Plant Premier and it works very well. Very dynamic, black backgrounds, transparency is great, all the detail and texture is there. The unit is very rugged and very well built. I had to give it at least 300-400 hours before it opened up. Sounds kind of dry at first before break in. It was worth the wait... Also, I think the P3 is much cheaper than the Hydra.