As mentioned on the Klipsch Forum, I really do think you would be happy with the Denon PMA-1600NE. I don't think you will squeeze any more "performance" out of the Denon over the Parasound combo but you might like the synergy better. Who knows until you try. If the newer Denon integrated amps follow suite of the older 80's/90's Denon integrated amps, then you are in for a real treat if you go that route. Also, don't be put off by the 70/140 watts per channel of the Denon. You will be pleasantly surprised by the dynamics and thump of the bass, IMO.
Bill