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Another good reason to get as large a dish as possible is too eliminate interference from other satellites in space that are near the one you are attempting to receive a signal from. It sounds contrary, but it is true that the larger the dish is the less of the sky it sees, it is more focused on a specific point in the sky. There are more satellites in orbit now than ever before, and some are only 2 degrees apart. To stop adjacent satellite interference the dish reflector should be, at a minimum, 8 1/2 ft.== Capability ==The 4dtv will get you both analog and digital feeds, this unit has everthing built in, a analog tuner for free analog feeds, dish positioner, DCII fta capable and DCII subscription, If you want to subscribe to analog you must get a VCII+ board, this board slides into the 4dtv, and is not another box taking up room, now if you want HD, then you must get the HDD 200, and this decoder connects to the 4dtv, to produce the picture, star chioce and many cable companies used the HDD 200 also , but most places have come out with a all in one unit now. The 4dtv will give you many free channels, but most are analog wildfeeds, some in the DCII format, but for those ones you must sub to something for them to be open, if you want more free programming from around the world, you can get a cheap DVB unit like a Pansat 2500a, or a high price unit that can catch some HD feeds, like a INT912, these boxes will work as a slave to the 4dtv, you will move the dish and polarity with the 4d and change channels and scan with the DVB box.