You're requirement of a hydraulic dump bed rules out the 500. You could add an aftermarket electric bed lift kit but hydraulic isn't an option.
That being said I purchased the RTV 500 for a few reasons
1) Gas engine that is extremely quiet
2) Fuel Injected for quick easy starts
3) Narrower width, it's able to fit in most any atv trail
4) Lighter weight so it's not as apt to get buried in mud as the other RTVs when going down atv trails
5) I picked it over competitors similarly sized units because of the hydro tranny, a set of brakes should last for a very long time on these...you never need them unless you're shifting
6) The 500's shift much easier than the other RTV's....for some reason it doesn't driveline lock up like the others
7) The fuel economy is crazy, you keep looking at the gauge on the tank and wondering if it's working still
The only big downside I've seen so far is the aftermarket accessory suport for the RTV 500 isn't great...you can get anything you want for a Rhino or Ranger but for an RTV you better make it yourself or buy from the dealer.
This is my 500
Had it for a just over a year and so far no regrets, it's done everything I've wanted and more so far...even pulls the bassboat under the tarp in the background...it's a fully rigged tourney boat so it's 2500+ lbs and the 500 pulls it like a champ.
