Look on ebay, or other places for Specialized enduro pro D2 2.4 tires.
Great tire, true UST, 980g super grippy, and big, true 2.4 size.
I had them on 819's front and rear. It's ok on the rear, but I didn't like it on the 819 in the front, so I went to an 823 in front and that flattened out the tire just enough to make it perfect for me - great corner bite, not super fast rolling though.
Never flatted one, knock-on-wood, and I abuse the heck out of them in the rock gardens, and what-not.
I'm going to try a lighter "trail" wheelset - Stan's ZTR Flow rims, and a Specialized 2.3 Eskar up front, and Specialized The Captain 2.2 in the back, set up tubeless with Stan's sealant (these are 2bliss tires not true UST.)
CZ: That new Eskar looks really cool, I may have to try one.