Welcome to Satellite Guys!!!
I left Cablevision back in Sept. '09, and I could not be happier. You may get rain/snow fade that doesn't happen all too often, if your dish is aligned well. Not to mention, if and when it does happen, don't stray from your tv, the picture will be back in a matter of a minute or two. With the exception of the heaviest rain and snowfall. I have much better picture quality with DirecTV, although Cablevision has vastly improved. I used Versus as my barometer, when I first switched, which was horrible on Cablevision in the area where I lived. When Versus finally came back on DirecTV in early '10, I found the it to be crystal clear. But, today Versus (NBC Sports Network) on Cablevision is markedly better, on par with DTV.