If I had a flagship reciever like the Yamaha RX-Z11 or the Denon 5308, I don't think I would use external amplification. I vision the non use of very well designed robust amplifiers as a big waste! I don't mean this as a slight to anyone who does.
I see it like buying a Porsche and towing it with your Bugatti!

I am probably too frugal.
