The installers will be out in the morning to install my system. I will be getting three receivers(811,311,625). Is there any particular problem with any of the receivers that I should be aware of? My next door neighbor had Dish before he moved and left me his Dish500. Would the installers hook up that dish along with the SuperDish(need it for locals in Norfolk,VA) they are bring out so I can get the Voom channels without having to pay $100 for another dish that I already have. Thanks in advance for any help that I receive.