If you are using it primarily for work, you need the RTV. There is no better work UTV on the market.
The rest are great for play and some work, but not mainly work and some play.
Mine has around 4800 hours, although it does have a new engine because we screwed up and ran it low and spun the bearings. Other than that and some operator related repairs, it has been reliable and one of the best pieces of equipment I have ever owned. We run it all summer long as a spray vehicle, and overgrown wheelbarrow. Winter it has a Blizzard plow and either spreader or it used to have a liquid sprayer on it.
I also have a Gator XUV that I have spent more money on keeping running in 2 years than the RTV it's whole life.
"Science is the belief in the ignorance of the experts" – Richard Feynman