Hi JWalker: I would second the recommendation on the Maxxis tires. After pricing the tires, my findings were that the Maxxis tires in my size (235/80R16) were less than half the price of Goodyears (G614 RST's in 235/85R16). The Michelin's were higher in price than the Goodyear's. Although I do not have first hand experience, numerous persons on this forum warn against buying the Goodyear Marathon tires.
I bought the Maxxis tires this past February, replacing the original Tow Max tires. The Tow Max's had approximately 11,500 miles on them when I took them off. I have roughly, only 1,500 miles on the new Maxxis tires currently, but they look new and are doing fine. Much more comforting to roll down the road knowing I'm not going to be a Tow Max statistic. Incidently, when changing tires, pay careful attention to the valve stems the tire shop uses. They put rubber stems on my wheels, and I didn't notice until I was about to pull out of the tire lot. I quickly brought it to the salesperson's attention, and as I was short on time that day, they happily changed the stems to metal stems two weeks later, plus they gave me a $70 credit for my trouble, which paid for the diesel fuel. The metal stems made quite a bit of difference in the TPMS reading tire temperature as compared to the rubber stems reflecting close to ambient temperatures while under tow. Happy Trails, gebills