Just updated to Dish HD yesterday. They installed a 612 HD DVR, but used the 500 dish I dad on the roof. My signal strength seems to vary from around 35 to around 75. Everything seems a little fuzzy( HD and Standard). I'm running Monster 1000 Hdmi cables into my 71 series Samsung. Any suggestions about picture quality? Should they have upgraded my dish? Is my signal strength too low? Pleae help, I was looking forward to HD, but my old tube TV was better than this.---Thanks