Have you considered a flail mower? They can make a grass field look like a golf course with the proper finish blades.
A finish flail mower can also handle moderately tall grass if that is an issue. However, it is not designed for brush, saplings, bushes, and the like. Wet grass taller than about 2' can get wound up in the bearing area with the finish blades.
Flail mowers are expensive but have distinct advantages. For the price of a rotary and a rotary finish you might be able to get a flail mower.
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