I think you made the right choice, Turtle. Polaris made the Rzr narrow so it could use trails restricted to ATVs. If this isn't important, the wider Teryx should be less likely to flip over. I also looked at Artic Cat's Prowler, which I think is even wider. Kawasaki chose their width so the Teryx would still go into a full size pickup bed. Don't know about the Prowler. If ATVs keep getting larger, we're going to end up with the equivalent of an old Willys jeep. I have one, and its not much bigger than an ATV or heavier than a Kubota diesel ATV.
Gotta head off to the Kawasaki dealer and sign the paperwork before service starts diagnosing the Rzr and changes their trade in offer.