Simply said yes any of the systems sold at
Sadoun's is fine. Naturally the larger the dish the better the picture quality so going with a larger dish is always a good thing but I am having no problems with a 76cm.
Try to stick with a receiver that has blind search and USALS. If you go with a receiver from Fortec and it is designated with NA it will be preprogrammed for North America. Not everything but a good start.
Motor will be governed by dish size but the
SG2100 is supposed to do the
120cm dish so getting a smaller dish would be less load on the motor which in theory should help prolong motor life. Price is comparable.