Seems every day I see a new tire that would be cool to have.
I'm currently running Dunlop D606 on the rear and a TKC-80 on the front. I'm happy with it, however I've heard the TKC-80 doesn't do well in mud do to close together knobs.
Previous tires were Pirelli MT-21 front & rear. I didn't like the MT-21 on the front, it felt very unstable.