You are pondering a huge mistake if you like music. I'm with all the others and do not trade your NAD for a Denon AVR. The preamp sections in AVR's, even in so called Pure Direct mode are a mere afterthought. They are built for digital surround sound formats, not 2 channel stereo music like the NAD
I spent 10 plus years in an affair with the HT mistress, even using flagship AVR's and HT separates, always to be left unsatisfied with music. Your Totems are fine speakers so keep them happy. Keep the NAD.