"Direct TV requires two seperate dishes. One for Digital, and one oblong shaped dish for HD signals."
Not True!!! You need one or the other, not both. If you have NO HD and NO Para Todos programming you only need the round dish. If you have HD or Para Todos you need an oval dish. The current 18x20 oval dish has three LNBs for three sats, but even better 4 outputs from the built in multiswitch. I had a round dish and did the change to the 18x20 myself...it's fairly easy if you follow the directions
