I just received my PA3s. It seems quite powerful, and the sound is clean and clear (even via my KEF Q100 speakers, which aren't the best). My little gripe with it is in terms of usability: the speaker wire binding posts on my unit have the through holes all going up-down, instead of sideways or at least at a 45 degree angle; and the holes are tiny. These factors make it painful to wire without mini banana plugs. In particular, the black wires at the bottom tend to cause the rear of the unit to be jacked up a bit off the desk unless you've got *really* soft wires.
In contrast, the S.M.S.L. DA-6 has much more sensible speaker wire binding posts: bigger through-holes and the through-holes are at 45 degree angles.