This is where hondas shine. Low speed working is what they are basically made for. I'm pretty sure this is why Honda limits their working atvs to 500cc because when you get into the larger displacements, you start to gain a lot of extra heat for extra HP that's more likely to be unusable in...
Get a Honda foreman 500. No belt drive so no worries there. Plenty of power to pull a disc around and small trailers. Honda makes great machines that are very reliable. They don't have the power and size that most other brands do, but what they do make, run forever. I wish I kept my Honda...
Recent favorite has been the browning strike force. They seem to keep making them better each year too. I've tried most of the brands out there and if your not looking to spend a ton of money the brownings can't be beat.
I do love reconyx though. Had 2 in the past and loved them. Unfortunately...