dranil,
Hows the bluray playback on Dune HD max? are you doing the HD decoding in your Dune or the Onkyo? Do you find any difference in the two? I have an older Denon 1906 which has no Hd decoding so I take the 5.1 analogue out from the Dune to the Denon.
Bluray playback is excellent on dune hd max. its decoding is top class though i do it on my yamaha receiver. I really don't find any big difference between the decoding abilities.