I am getting directv installed at the house with a Genie and mini-genies. Down the road, I want to buy an additional receiver that I can use at the house or in the RV. Should I order the receiver from DirecTV? I'm thinking that's the easiest thing, and just have them add it to my house, and I can take it with me on the road. I realize this can't be a mini-genie. Which receiver do I need? Follow on question, where is a good place to buy a dish & tripod to take to the RV? what models do I need to get HD, I want a receiver and a dish that get HD. I'm ok with manual aiming, I don't need the auto aiming system. I just want a simple oval dish & tripod kit.