I had a Ferris IZ 48" cut with a 2x hp Kawi engine, the entry level to the commercial line. I used it on a 3/4 acre lot and mowed my SIL's lot of similar size as well for 15 yrs. Needed new rear tires due to dry rot, and a drive belt for the blades, changed the oil annually, etc., mowed good/level, rode good. I tried to avoid cutting when wet, but it handled it fine, the thicker spots of grass it would bog down a little but did not change the cut quality. I sold this mower to the owner of the lawn service I now use and he still runs this machine on the football fields he mows with a grass catcher set up.
I don't mow the yards now (tired of hearing the other half fuss about me out in the heat, etc) the lawn service uses Scags, they are HD machines, but they don't keep the blades sharpened, and go too fast while mowing, so the cut quality sucks IMO. I don't think the machine is at fault, the lawn service is for not servicing the mowers and QC over the end cut. I would buy another Ferris if I could get one with a Kawi engine in the same size but don't think they offer that combo anymore.
GO BIG ORANGE !
I meant to behave, but there were just way too many other options available at the time.