After the download, I did a full default restore this morning.
I am thinking the picture looks a lot darker with my previous (numbered) settings.
Am I loony?
Regarding your first comment, if the Oppo up-converts the signal to 4K and passes it to the display, they display perceives that the signal is already 4K and doesn't try to up-convert it a second time. So, if you were to have a player that up-converts, and an AVR that up-converts as well (e.g. the Denon 4520), then you could try the up-conversion in three places (player, AVR and display). By using a test disk like Spears&Munsil, you could easily determine which of the components did the best job of up-converting.
Don't have an answer to the second question. However, as I mentioned in my earlier post, if the AVR will not pass the 2160p/30 signal, then connect the PC directly to the display, and have a second connection from the PC to the AVR for the audio signal. This is quite common, especially with AVR's that don't pass a 3D signal.
I am getting indications of a slow connection when using 2wire.com, but when I measure using speedtest.net or speakeasy.net/speedtest, the connection is 15mbs, which is what it should be. I say the 2wire.com site has a bug.
From their web site:
This connection tests how fast your computer can load a Web page from the 2Wire Website. It does not measure the speed of your ISP connection, but rather the speed at which the page is received and appears in your browser.
Bandwidth does not always mean the same thing. Other meters measure how fast your connection is able to find a requested Website, or how fast you can send and receive email.