I'm sure this has been discussed numerously. Although, I too am on the same boat. I mentioned to a recent posting, that I'm considering buying the same OEM Goodyear Fortera HL's since most of my driving is done on-terrain. We have about bit over 24K miles, and the treadwear markers are showing up pretty close already. The tires have run great... but they're beginning to be a bit slick now-a-days. As a solution, since I never used the spare tire, I'm willing to shell out the money for three Goodyear tires to replace, and use the best shape 'current tire' as my spare. It's an option to consider, if cost is a concern. If not, I was going to consider the following:
Firestone Destination LE
Bridgestone Dueler Alenza's
Good luck and let us know what you decided on.