I can recommend the Orbital 80cm dish as Ive been installing them for three months without trouble. Excellent gain and very fast to assemble. There is a 1m but I have not had experience with it.
1.2m - yes the Channel Master is good, but only suitable for use with a worm drive actuator, unless they have updated the backplate for a DiSEqC motor. It is rather heavy for DiSEqC operation, so the Gibertini is preferable (though be very careful purchasewise if you are buying from the importer - credit card and get everything in writing).
As for motors, it all depends on which receiver you are using