Check out this thread I started last fall: http://www.qcforc.org/showthread.php?2655-Tires

Some of the replies to that thread were spot on. You can go nearly broke searching for the holy grail of tires, and it is a good idea to roll with what ya got to learn the subtleties of the tire. The trails are like concrete right now so I'd think your SB8's would be perfect. When the leaves fall from the trees then you might want to invest in something with bigger knobbies and by then you'll have a better understanding of cornering and tire tech.

I thought the stock tires (Specialized Fast Trak LK Sport 2.0) on my 29er were gonna suck but they actually roll pretty well and corner decent, but I'm coming from a fat bike and that thing was like a tank so a lot of it is relative.