I would make one comment: I see no benefit in HDMI v1.4 at all. Also, I would note that DVI doesn't offer audio, I would lump coaxial and optical together (each has pro's and con's), and I would add multichannel analog as a wild card. The BDP-83's analog section and extensive decoding capabilities can put it up close to HDMI (or even better than, depending on the receiver).

If you look in my BDP-83 review (in my sig), I have a link to a set of Outlaw/OPPO setup guides that includes a detailed discussion of how to pair the 990 with the BDP-83.