I have a four horse horse trailer that i will be pulling it with. I also might just get the one ton because I load it alot of times with sand and/or gravel and that can get really heavy (3000 lbs). The diesel engine is inorder to pull the horse trailer. What do you think. Does the 2500 have a better fuel economy than the 3500. Prices wize is it significant at all. The 3500 does weight more than the 2500 but I don't see why this should significantly increase the cost PER mile but mayby it does.