I would say the Oppo 105D is very good. You can run three ARC stereo preamplifiers, if you are content with the Oppo’s DACs? You have the subwoofer connected to the Oppo, then you have very high-end theatre, with whatever big power amplifiers you desire. Then you have 6.1, are there many Blu-Ray 7.1 disks out there?
The high priced processors are not worth it to me, and most of them are behind the curve. Some, I see sold cheap now, but no audio HDMI. Would I get the high dollar processor, not unless I had the newest HDMI 1.4 and maybe not even then.
I think you get a bargain buying an older Denon (model 4802) and using the 7.1 inputs from an Oppo to the analogue intputs to output a large two channel power amp, then you do have all the new audio formats, usually DTS HD Master, as the Oppo will do that with the analogue outputs.
I use this for my bedroom and it uses the amplifiers in the Denon for the centre, surround and rear speakers.
I have am ARC stereo with a Cary SS amplifier and a Classe SSP 25 for SACD and for movies in the lower 5.1 with the older coaxial digital, and it works for me when watching movies.
One system is just a single room, high-end stereo, which plays movies to my satisfaction the other is an HT system. If I have to have the higher audio movie sound, I use the Denon set-up; it works for me.