i actually think the kubotas are under powered. they are also loud and ride very rough, but you can't beat them for work and hauling capacity, very good for what there made for.
i agree that the polaris is a good combo utv for work and some play.
i have 2 rhinos as well, i have a 660 and a 700, i like both. i do some work, haul wood etc, but mostly we like to trail ride. perfect machine for that.
when looking at utv's, pay attention to the overall size and turning radius......apply that info to how you think the machine will get around the terrain you are going to use it . rhinos get through most trails that 4 wheelers do, some bigger machines can't do that.
they all have pros and cons