I have a Dingo 420 and love it. The benefits of these minis is that they are easy to transport. We find that when you have those jobs that are a little far away and you dont want to drag the skid steer out to move the butt its easy to bring the mini. We almost always bring it on any removal. When it comes to soft lawns its great becuase it you can lay plywood down length wise and still turn around on it. I demod track and tire machine the choice to get tracks was quick the tired unit was very jerky and controls were difficult.
To get around the speed issue I still bring the ball cart because moving large rounds out is not that bad its picking it up thats the problum which is resolved with the dingo. Even though it wont dump over the sides of my International it will go into the back then we just roll large rounds up to the front.
On the topic of engine size, I have no problum with only being 20hp it sips gas and I rarely ever have it throtled up past half, unless I am running a trencher, augeror harley rake.
I have a clam shell bucket for mine and have great luck with it. Nice for cleaning up grindings, and works perfect on logs that are 18 inches or smaller squezess right around them like a grapple. When it come to bigger pieces it sometimes a little balancing act but it doesnt take long to fig out.