I'm dish shopping and I'm confused about which dish I need, I've been running a 500 dish with a quad lnb with 110/119 sat's. So, I assumed that I need a 1000.2 dish with lnb for 110/119/129 sat's. I'm located near Statesboro, ga., zipcode 30461. I am upgrading to HD but still want to get all SD channels. How do you determine if you need eastern arc or western arc dish setup?