Now that I have my new 990 set up, I'm thinking about making one more significant change.......beyond using a composite connection to access the on screen menu, I am currently using only the 990 audio inputs, and it sounds great, but I'm wondering what benefits I would get if I use it for video as well.

All of my video sources are being connected directly to the back of my Pioneer plasma. I don't have or need a cable or satellite box, but I do have an outoor RF connection from my roof top antenna and a direct RF analogue cable feed going to the back of the TV with an audio optical out going to the 990. The Pioneer Plasma has a very good upconverting TV tuner for analogue, so I'm reasonably satisfied with its standard def image, and It's hard to imagine its HD performance being any better. My Denon upconverting 2910 universal player is hooked up via an HDMi to the plasma for video and coax digital and six analogue connectors to the 990 for audio. I also have a stand alone HD digital recorder and tuner that receives a direct RF feed that is connected to the TV via component and the 990 via optical for audio.

All of these devices are being nicely managed by my Harmony 880 remote, and since everything is in an entertainment center that conceals the wires, I'm not concerned about having just one cable (HDMI) going to the back of the plasma.

I realize with this configuration I am giving up the lip sync function.....beyond that, is there anything else I'm missing by not using the 990 video inputs?
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B&W 804s mains
B&W HTM4 Center
Outlaw 990
Anthem MCA 30 AMP
Audiosource Stereo AMP
Monitor Radius 180 surround
Comcast DVR
Sony HX929 LED TV
Apple Air Express/Apple TV