Hey Marc,
I know that Axiom usually says stay with Denon, HK, or seperates cable of 4-ohm. It seems I did see another member recently ask Yamaha the same question, and was told yes. However, I can't remember the model, it might have been the 5790. You might try searching.
Any reason you don't want to look at the 60's, they are very very similar. The 80's can play at more insane levels, not sure your 5740 could produce anyway. How big is the room?
randy
m60's vp150 ep350 4-Qs8's
denon 2805
sanyo z2 projector
toshiba dvd
samsung HD receiver