I put 283/85/16 Dunlop Mud Rovers on my Disco I about 12,000 miles ago. I can't say enough good things about them. Living in CO and having a 50 mile commute one way, I can say they do great on the highway and in the city, not much noise at all. My wife and I can have a conversation, even with the windows down. In the snow, they have done great. I've plowed through everything I've come up against (except a snow drift that I approached too slow, and buried to the frame). On trails, they've been great as well. I've been on Jenny Creek, Red Cone, Webster, Radical Hill, Bill Moore, Lefthand Canyon, Loch Lommond, MIddle St. Vrain and Coney Flats (If you know the trails) and I have had absolutlely no issues with traction or damage.
The price was pretty good too. $109 each mounted and balanced at Discount Tire. Unless I come into a ton of money and can afford BFG MT's, I'm going to stick with the Mud Rovers.