Picked up a second hand set of Cooper ATR's 275/70 17 on EvilBay this week. Looks fractionally more aggressive with pubescent 'side-biters' but according to my wife it drives the same as the factory Wranglers.
My first drive will be at the Wheeny Creek run with SJC this Saturday where I will take advantage of the 7mm extra clearance under the diffs
Not really expecting much but being LT construction should make them a little tougher.
Tires are a stopgap measure until I can afford some muddies on a second set of rims.