I can not say for others but as far as I am concerned, HDVD 800 and HD 800 really is the best combo to my ears. Not to mention, IE 800 can also show you it full potential with HDVD 800.
BTW, I do not think that this is the best looking amp I have ever seen. The design and look is simple and elegant but again not the best I have seen. However, they sounded best under all other under 3K amps that I have to my ears. So it's really subjective what do you think is good sound. But they really put my other amps to sleep for now. I don't see waking them up in the near year or so at least.