Some excellent choices here. I will add one more.
The OPPO is great IF you are going to use the built-in DAC, and output the
audio signal via RCA cables. If you are sending the audio via digital HDMI
or TOSLINK, the DAC in the AVR is the one processing the audio and the
OPPO's strengths are really bypassed.
If the latter is the case (which I'm guessing it is), then spend more money
on the AVR, and less on the BluRay. The setup I have is the following basic
setup, and it is truly fantastic for movies (100" projector), and
excellent for audio.
Sony BDP-S790 $250 (new on ebay)
Pioneer Elite SC-77 $1,400 (new on ebay)
If you review these components, you will be hard-pressed to find a bad
review. I am pushing my Mirage OMD-28s, and matching center/surround
with it (front three channels bi-amplified), and I could not be happier. I came
from the Marantz SR7001, which I liked, but will never go back to. The
clarity and control of the SC-57 I use is really stunning, and the room
correction doesn't add the veil that many do.
Hope this helps!