Okay, here's the thread you really want. :
it'll take you a while to get through it, and understand what any of it means, though.
What we really need is a thread that evaluates tires on 7 different points:
Dry Asphalt Grip
Wet Asphalt Grip
Although even that is clearly over simplifying it.
I don't have much experience with tubeless knobbies.
My next purchase will probably be a set of Kenda 760s, or maybe 270 & 760 combination, or maybe Dunlop 606s, or pirelli scorpion pros, or maybe these
, which got good reviews here.
What size tire do you need?
Oh, and if you're looking for a 19" rear, I've probably got (pretty much brand new) the best DOT knobby ever made. Just no bike for it...and can't find anyone who needs a 19" rear.