None of the above. Get you a used Dodge 2500 diesel or F-250 diesel and have at it. If you don't want to go that big I would say a Nissan Frontier V6 ext cab. Toyota's are too much money for what they are. Even a good used one is bringing crazy money right now. I wouldn't jump on the colorado 5cyl until they have a bit more time to prove themselves. I love Jeep, 4.0 I-6 is one of the greatest engines of all time, however, transmissions have been a weak point. For the purpose of towing, even something light I would be a bit skeptical of the Liberty. Just my opinion.