A lot of the newer SUVs have really, really good power. For example, I know a number of guys who tow their 4k lb trail truck with a Land Rover LR3. I know its not anywhere near as good as an american diesel 1 ton, but if you are towing once every other month or so, its quite nice to have a super nice SUV the rest of the time. 300hp, air suspension, tows just fine. Most of these guys are towing once every 3 months so having a usable SUV the rest of the time is quite nice.
Back in normal people world (sorry, I am really hot and heavy on a LR3 right now), the new 6.2 V8 from chevy + the 6 speed auto trans, I can only assume it tows like a champion. I know for a fact that the newest Yukon Denali XL trucks are very, very, very nice (probably out of your price range but I suspect the newer burbs are right there with it). Except for Harlan, seems like most of the other wheeling places these days are pretty close to reasonably sized 4 lane roads. Same story with the ford Expedition. Very good, stout gasser V8s and transmissions.
However I echo what everyone else has said, the diesel brings all kinds of win in the towing department. However anything with less than 100k on the clock still demands a decent amount of coin.