I have an older Dish Network setup that I'd like to upgrade to HD but there are some potential issues holding me back... I'm hoping that you can help clear up some of the unknown issues for me. Equipment: Dish Network 4-receiver setup with Model DISH311 boxes and a DISH500 (w/ dual-LNB) with a single DP34 switch, located in the Chicago area. (I also have another antenna pointed at 61.5 that I don't believe I'll keep). 1. The DISH500 antenna is mounted remotely (50' away from house) on a pole with a very limited line-of-sight picking up 110 and 119. Does upgrading to HD require pointing at new satellite locations in the sky? If so, where? I'm hoping it's the same area or very close... I cannot rotate more towards the S, and I can only rotate a little more towards the SW if needed. I cannot tilt down, but can tilt upwards without limitation. 2. There are two buried coax lines running to the antenna pole from #1 above. Does upgrading to HD require a new antenna and LNBs? If so, how many and which model(s)? Will two coax lines be enough? Currently, my DISH500 antenna has a DISHPRO dual LNB. 3. Mounted on the house, I have an antenna pointed at 61.5 using one LNB, but again, this one has a narrow line of sight. AFAIK, I don't even watch the channels coming from this one, so it can be abandoned or used for something else. 4. I already know that upgrading to HD requires new receivers. Can I use a mix of old and new receivers? I have a DP34 switch. Depending on upgrade costs, I may switch to DirecTV. 5. I am also open to switching to DirecTV if it helps me avoid having to move the remote pole and buried lines. THANK-YOU for any information and insight you can provide.