I bought my Hoosier radial wets in 2007. I think they are far more versatile that the dirt stockers and far more durable. I have not used them a lot maybe 3 or 4 sessions a year but they are still good. I got a pole in wet qualifying last Memorial Day against 6 or 7 competitors on them.
Of course that might have been because of my awesomeness and not the tires.