Tubes for B&W 803 good?

Do you want to have separate pre/pro's for two channel [Music] and multi-channel [Home Theatre] listening?

If you're talking about the Nautilus 803's, make sure you get an
amp with enough power to drive them. I think Plinius and Classe'
amps work well with B & W because they are warm enough to tame the high end, which can be fatiguing with B & W speakers.
I would shy away from tubes with B & W because they tend to
be inefficient and hard to drive. But, with the right amp, the N803's
can sound great. I heard them with a Plinius SA 250Mark IV and
they sounded great. I don't think the Rotel would do them justice.
Just my opinion.