You should run a PDH cable from your 990's DVI-out to your display to carry the video from the Sony DVD player and your HD cable box. I am curious as to why you are runing the 3 PDH cables from your 990 to you display? If it is for the OSD you can do that with one S-video or composite cable for a lot less money. Audio cables from your 990 to your display are not really necessary. It looks like you have thought this out really well.
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Epson 3500 3D projector
93" Carl's Place Flexiwhite DIY screen
Outlaw 976 Pre/Pro
Outlaw 7500 for center and surrounds
2- Emotiva XPA-1Ls for LF/RF duty
2- Outlaw LFM-1 EX subs
Oppo BDP-105 Blu-ray/DVD/SACD player
Outlaw LCR (Snell Labs) for center channel duty
Tekton Lore monitors L/R
4- Emotiva ERD-1s surround speakers
Monster HTS3600MKII power center