hey dan - i'm basically a tube-junkie, but have given in to the avr-793 with jamo 670 'speakers and s1-series surrounds, sub and center. have put it in an as-yet empty room with terrible acoustics - and was pleasantly surprised to hear the output - am now putting in benq projector (best value for money this side of the world) - everything should be up and humming this weekend, but suffice it to say that the massive toroidal transformers on the 793 are unmatched by anything in this price range.
cheers
rahul