I have ran more sets of quad tires you can shake a stick at. Everything from 25" all the way up to 31"
I will just give you a quick summary of what I have used and think of them.
Kenda Bearclaws - Just a average tire. Average wear and not much better than most stock tires.
Maxxis Mud Bugs - The longest lasting tire I ever ran. These are great mud and snow tires. The run smooth and are super strong.
Maxxis Mudzillas - Great strong and lasting tire. Too big of lug for most people. Lots of center lug so they run smooth.
Highlifter Outlaws - The best mud tire on the market. They have wide tread spacing for good clean out. They wear quickly and round out on the rocks. One of the roughest tires. They will vibrate your forearms pretty good after a long ride.
ITP Mud Lites - Good design but have a tenancy to not hold air, rip lugs off, and puncture.
ITP Mud Lite XTR - A smooth riding radial tire. Great traction probably one of the best all round tires bade in the past 10 years.
Maxxis Bighorns - Not so good for the mud but a great trail tire. This is one of the #1 tires people use on ATVs and Side X Sides in off road cross country racing.
ITP 589s - Good mud tire, last a long time but rough riding.
So overall in my opinion it would be a tough choice between ITP Mud Lite XTRs or Maxxis Mud Bugs.
Maxxis Mud Bug
ITP Mud Lite XTR
Highlifter Outlaw
Maxxis Big Horn
