What type of satellite dish should I buy?

In 1979 Soviet engineers developed Moskva (or Moscow) system of broadcasting and delivering of TV signal via satellites. New type of geostationary communication satellites, called Gorizont, were launched. They were equipped by powerful onboard transponders, so the size of receiving parabolic anntennas of downlink stations was reduced to 4 and 2.5 meters (in comparison of early 12- meter dishes of standard Orbita downlink stations).