We've got a Kawasaki Teryx. It's 4wd and got really good suspension (due to it being a "sport" model) but it's a gas engine. I dont think you can go wrong with a Polaris Ranger. Also really good suspension, and you can get it in a diesel. Having used both, those are my picks. The suspension is important to me because if you've ever bounced across a pasture in an old gator or mule you'll appreciate that. Some of the new gators are similar to the Teryx, but I find the John Deere green paint to be a little more expensive (lol).