Just to clarify things, I have two 50" mowers and 10 M76461 medium-lift blades. These mowers and blades are ideal for my property. I mow two areas with them: 1/2 acre of landscaped lawn, and 2 acres of pasture. About 2/3ds of the pasture is flood irrigated from ditches. The remaining pasture and lawn are watered by sprinklers fed by water pumped from another ditch.
I've mentioned dust as a problem, in the past. One major project was to get grass growing in about a 1/2 acre area in the pasture that had been ringed off for use as an horse exercise arena, and that grew more weeds than grass. It was a three year project to get grass, that started with killing and tilling the weeds, followed by a couple of deep rototillings. Until I was able to get a good grass cover established, I'd get a fair amount of dust. It was fairly manageable with the JD mowers, but running a Husqvarna 48" stamped deck was just plain out of sight, even with the lowest lift blades available. Had to use a respirator, and that deck makes a dandy leaf blower.
I mow in Wyoming conditions, which are very definitely different than Eastern (or "Midwestern") conditions. Normal annual rainfall here is about 8", and dew points are normally near freezing. So the grass is either "dry" or "very dry," and there is never morning dew. Only the flood-irrigated areas are wet while flooding them, and they dry up 24-48 hours after I shut the water off. In addition, good pasture grasses here are coarse grasses that do not spread, so even good grass areas in the pasture have plenty of soil visible, looking straight down. The lawn area was originally pasture, but has been overseeded with spreading grasses that hold the dust down, even dry.
I mow at 3", which is a good level for my conditions. Lower, in the lawn, looks better, but gives burnout in midsummer. Also, with the mowers set that high, I can mow with open chutes (no deflectors installed) and get very little windrowing. Topsoil maintenance is critical here. The subsoil on my place drains better than most Wyoming areas, but is Ph8.4, quite alkaline.
The 50" decks with the JD medium lift blades give me a very nice cut. It's a real pleasure to listen to the bark of a 318 Onan, the hum of a 50" deck, and watch the grass spew out of the chute. I'd rather fight than switch.