Some of the Goodyear models are decent. Most people I know with XJ's run A/T, so I dont know that many that run street tires.
The Wrangler MT/R's ( I guess now the kevlars) are really good. A set that was cheap and decent that I had on one of my old XJ's was the wrangler SR/A's ( I think )
Here's a list of the tires that I have used that have worked the best for me..
Dayton Timberline A/T
Bridgestone Dueler A/T (693, 695 or REVO)
Cooper Discoverer STT