Piggybacking this thread to note I ended up picking up an Anthem MRX-510 after doing some investigation following Turtletrax's mention of them in here. Initially wasn't happy with it but as of yesterday evening the recent firmware has corrected my annoyances with the unit (short delay after starting paused/stopped playback resulting in audio loss).
The menu UI is intuitive and it's highly customizable down to specifying particular inputs and modifying sound beyond even after room correction has been used. Firmware updates and applying room correction files (after saved) is a breeze. It also sounds significantly better than my old SC-05 Elite. I'm guessing this is in large part due to the fact that the ARC-2 room correction seems to be superb. If you're willing to spend a bit more I can't imagine anyone being disappointing with it. I grabbed the MRX-510 due to the pre-outs to a separate amp if down the road I was willing to go that route, but overall I'm quite pleased with how it's handling my B&W 683s.
Anthem is a division of Paradigm by the way, support goes through them directly.
I had similar issues with my MRX500 in the beginning. Major black to white screen flashing when switching inputs or going from one section of a BD to another which caused almost seizure level flickering with my projector. Also major speaker popping when changing inputs and audio codecs. I was really upset as I had such high hopes. I then began dealing with engineering and reporting issues and actually got results and direct assistance. I couldn't believe it. After two firmware revisions all was solved and it has done so well that I will never sell it. It will be moved to other duties when the time comes to replace with new tech. I was so happy with it I passed up the Anthem D2V for 2 grand. On retrospect I should have grabbed that, but would have had to pay for 3D upgrade.
The Anthem MRX x10 lineup solves the few things that I do hate about my 500 tho. Serial ports in this age is laughable and ARC takes quite awhile. All in all, fantastic stuff and I get a pretty stellar deal on AV gear from a place I used to work doing their installs. Will always keep an eye on Anthem
I might be interested in Atmos down the line. My theater room is quite long and I have a pretty decent collection of speakers, if the codec can accurately translate location it will destroy 11.2. which I always though was quite gimmicky.