Not much to say really. With P10 sound is just much better, much less wrongness to it. With the 3RQ, it's more of the good stuff, and even less wrongness.
With P10 -> Equitech, it's somewhere in the middle of the scale.
My power quality here is extremely bad though, so the improvement was huge huge huge. As a bonus, used Equitech goes for way cheap on Ebay and I think they last forever.