I'm supposed to get Dish service on Wed. and the more I read the more confused I get. Im getting a 722 hd dvr and Im not sure about the second receiver but its a standard. I am having a 4 tvs hooked up, at night me and my 3 kids have 3 different tvs going. Will we all be able to watch something different while I record on the 4th tv? So essentially can we watch four different channels.