I just took delivery of my Toshiba 55H70 today, and have a quick question. I've gathered through this forum that standard cable TV doesn't always look the greatest on TVs like this, as it tends to magnify the irregularies. So I ordered Digital Cable, and got a 12ft S-Video cable (from Radio Shack, was in a hurry) since the general consensus is that the picture will be better with S-Video vs. Coax. With the S-Video input, there is alot of grainyness, even my girlfriend IMMEDIATELY noticed it. It happens on every channel. If I use the coax video out, it looks crystal clear, whether I go through the set-top or if I plug it into the TV directly. Any ideas why this is happening? I'm assuming one of 3 things: 1) Bad set-top s-video out port 2) Bad s-video cable (does brand really matter?) 3) Bad s-video input ports on the TV (but I tried both of them). Let me know, as I'll probably just get rid of the set-top if I can't resolve this, the only reason I got it was for the clearer & sharper picture through s-video. Thanks.