On a truck? I'd go with a Mudder too, but since you're looking for a sport tire try Firestone's Firehawk, or Potenza. I have the Firehawk on my Mustang, and those things will grab the ground like nobody's business. The Potenza is supposed to be better, but they cost A LOT more. You might also want to look into some Yokahamas, but I don't know which styles.
Just a note I forgot to add. The firehawks on my Mustang are 17" rim. I doubt they are rated for a load (I don't know if any Z rated "sport tire" will be), so they may not be suitable for a truck, but they will hold the road for you.