I would look at the 2005 and up Jeep Grand Cherokee. As long as you get a V-8, you should be able to tow the weight you need. Here are the ratings I found on the interwebs.
Engine Transmission Maximum gross trailer weight (GTW) 3.7L V-6 W5A580 5-speed 3500 4.7L V8 545RFE 5-speed 6500 5.7L V8 545RFE 5-speed 7200