receiver/Dish Network DVR HD BOX? I have a Samsung 46" 720p TV, Sony Blue Ray, Sony Home Theater system/Receiver (has multiple HD inputs), My Dish Network HD DVR Box...Basically I have it working,but I don't feel I have it hooked up correctly...I have my DVR hooked up to my TV, My receiver hook up to my tv and my Blue ray connected to my TV...is there a better way that I should be doing this...Also, in order for my TV to get the full HD experience should I get a special HD cable for my TV?