Here is my findings regarding the DVI-D single link cable that I installed last night.
I have the Dish 811 and Toshiba Cinema Series 57HDX82 RPTV.
Up to this point I had it hooked together with Component cables.
Installed the DVI-D cable and guess what, ZERO difference. I won't say worse and definitely not better but zero difference that I could see.
For a test, I had the little lady change what input she wanted by me leaving the room and coming back in and made me guess which input it was.
I was correct about 50% of the time, pretty much my odds!
I will save the cable just in case I need another input cable for a different source and use it on the 811 but for now, the 811 is still hooked up with component.
Save your money, don't buy a DVI-D cable for a RPTV. Maybe a LCD or plasma, but I saw ZERO difference on my RPTV.
Yes, both inputs were calibrated using AVIA.