If your house has prewire, at least one RG-6 cable ea. in 2 rooms (the rest can be 59, doesn't matter if sticking to 2 dual tuners, but all RG-6 reduces install headaches), there is no reason why new cable has to be run. In regards to your OTA HD needs: I don't know what other markets' official policies are, but in my region, whether it be a sub or a Dish tech, we will not install aerial HD antenna arrays. However, if you have the antenna installed before we get there, we have no problem combining that signal with our sat lines using diplexers. We would then re-separate the two signals at the other end, with the antenna feed going straight into the Antenna In port on the back of the receiver. You should go to dishnetwork.com and read up on the manuals for the receivers you intend to have delivered. They will help you greatly. The more you know before the tech comes out, the more you can tell him/her what you need done.