I paid a visit to the link you identified and found the Denon5308ci; it is a little too expensive for me at $5200. There was no Onkyo listed as having the Realta chip. What gives...or did I misunderstand your message?
Basic question is will the Onkyo 875 improve the SD PQ from a cable box or Direct TV on my 50PZ700U? I am using an Oppo 981 for DVD's and the PQ is excellent; I would like to match this PQ for broadcast signals.