Tirerack offers some offroad tires but doesn't offer ratings, aside from snow. Looking for something like a rallye driver would use in a decent price range. I honestly don't know what I'm looking at.
Are you actually going off-roading or rallye, or are you just looking for some good winter tires - in Ocala Florida?
Hoosier has some dirt stocker tires, so does Goodyear, but you won't find them at TireRack, the market is too limited for them. http://hoosiertire.com/specotd.htm
You might check into SCCA Rallyecross and see what tires are being used in that series.