I think the problem is that you already have one of the best HT processors in your current price range. I prefer the CX-A5100/5200 to any of the offerings from Denon, Marantz, and Emotiva. And you won't be able to find any modern offerings from Rotel or Arcam in that price range either.
What limitations are you finding with the CX-A5000? I find the user interface on the CX-A5200 just fine, and I chose it over much more expensive models because I preferred both the GUI and the sound quality over the competition when it comes to dedicated HT use.
What limitations are you finding with the CX-A5000? I find the user interface on the CX-A5200 just fine, and I chose it over much more expensive models because I preferred both the GUI and the sound quality over the competition when it comes to dedicated HT use.