I have the USP-1 preamp and have been very satisfied. If you have a perfect listening room, and expect the ultimate in the state of the art, go elsewhere. But I have a large, assymmetrical living room, with very high ceilings on one side.
Driving Vandersteens and a big Bag End sub, it does a fine job with both digital and vinyl. Not the last word in sound, but a solid performer.