If you want street tire that's agressive, you can't go wrong with Goodyear Authority currently at 148$ for 31s from Walmart. I have the equivalent in canada called Territory, and they perform very well in snow and water.
Duratracs and T/A KOs are much more expensive. While the Duratrac is located between the two tires mentionned previously and the KO, i've been told the KO has a longer lifespan due to the leveled thread pattern, which is also a weakness when comes time to move liquids (no channels throwing the liquids out).
But if there's a big sale, i'm thinking about switching to KOs next year, so i don't have to buy tires every two years (i keep em on all year long).
Hope it helps a lil.