The best (in my opinion, of course) is the BFGoodrich All-Terrain T/A. They wear really well on the pavement (meaning they don't get chewed through in 12,000 miles like the more aggressive tires do), but they perform exceptionally well in most off road conditions, from mud to snow to sand. Now, you won't get super monster traction in the crazy crazy stuff that those hard-core tires will get you, but I've been through some deep kaka with mine, and they haven't failed me once. Also, I've never even been close to hydroplaning in the rain (however their traction isn't near what a passenger car tire would be in the wet stuff, especially with an empty bed). Hope I helped!