After cooking the stock sprockets and chain off mine, I went to steel JT's front and rear, with a DID x-ring. Found that the ally rear wore out too fast. Just this minute in the process of replacing them with the same. Got about 7k miles on the set, with over half of that being offroad. Lots of muddy crap and single track. taking that into account I'm satisfied with the wear. They lasted last season, I can live wit dat.
I'd prolly get more life out of them if'n I was like Creeper, but life's too short for that.