Check prices on a Brush Wolf - compare to Bobcat and Diamond. Diamond is in a league of their own. It's made for server duty tree/brush clearing. But, the Bobcat and Brush Wolf would be equals. Brush Wolf is carried by Edney Distributing, so any equipment dealer should have access to them. Brush Wolf is very heavy duty made and they make a heavier duty model to compete with the Diamond also.

If you have a Bobcat dealer (or others), you should be able to rent a brush cutter for your skidsteer and try'em out.