What do you mean by "high end processor"? High end video or audio? The pricier Denon receivers have 1.3a as well as the Realta chip. I doubt anyone (except Faroudja) would argue there's a better video processor. If you're looking for the best video, go with a processor or receiver that has the Realta chip and 1.3a. Otherwise you've got 1.3a, but lower quality video processing to start with.
I'm not connected with any manufacturers, just a Denon receiver owner.