I'm a new LR3 owner. Just put 265/60/18s BFG AT KO2s on. I really like them. No change in on-road performance (if I could get them in stock height, I'd do it). Really haven't had them off road yet but considering I was on bald performance tires beforehand, I am kinda expecting a lot. LOL.
I do notice a touch more road noise but nothing the radio can't handle. We've had some bad rain and no issues there. Towing, they were fine.
One thing I did do: for my spare, I didn't want a tire that hangs down low. So I looked. You can get a 245/65/18 tire that is the same diameter, is a real tire, but narrow. Fits very well in the stock tire location and is nearly flush with the rear bumper. I've heard one can remove pucks to further move the spare up and and out of the way. I might do that. But yeah, just a way to have my cake and eat it too.
If you were wanting to run chains, I'd recommend wheel spacers. Get then a bit further away from the control arms. Cheap if you get them from LR Direct. I plan on spacers for my LR3 just to make the car look a bit more aggressive.