I'm no expert on video processors, but, looking at the manuals for both your projector and processor, the projector is 1080p native and the processor is 720p native. So, I'd have to say that you are doing yourself a disservice by using the processor with your projector. As you said, your other equipment probably have better/more modern internal video processors than the Epson HQV TX3 does. So, yes, by the specs alone, I'd say you'd be better off using the internal video processors of your Oppo or Roku A/V equipment. I'm sure others will be able to give you plenty of advice as well. Good luck.