Ok, I am thinking of upgrading to HD service. I have been with dtv for about 4 yrs. I am only thinking of upgrading 1 receiver and leaving the other 2 alone. Do I need a new dish? Do i need 2 cables running to the wall jack? Is there a receiver that does not have to be line of site for remote? I ask this because about 2 months ago I was upgraded to hd/dvr tuner. The tech showed up and asked if the basement was finished, I said yes. He frowned and said it might be a problem since I need a double cable for installation. Was this only for the dvr? Or do i need it for the hd programming? Thank you......