The Arcam is the best sounding of the three (I'm talking in terms of musicality) with the Rotel a close second and the B&K last. The B&K has the most features for HT and delivers more current than the other two. (Current is more important than Watts). The Paradigms are not a difficult load to drive so in reality all three units can drive them.
Good luck with whatever unit you decide to buy!
Good luck with whatever unit you decide to buy!