I've never heard of a Cheetah with 48" or 52" deck, always a 61" or 72". The seat frame has a suspension system and they are 2 speed hydrostatic drive. Typical vertical shaft engine configuration but with high HP engine selection. I know several commercial mower guys that have them, but older models, not sure what upgrades the new models have. Very fast ground speed, when in high range, too fast for bumpy, rocky, rooty, hilly New England typical lawns and commercial properties.
Have you given thought to a collection system? Scag collection systems function very well but do make the machine wider and the blower is close to the ground.
Always consider the dealers service department when deciding on purchasing any make of machine.