I'm in the same position. I have a 2011 Scion tC. I'm starting to like it less and less. I only get 25 mpg as well. I drove a 2016 Ram 1500 Quad Cab with a 6'4" box and 5.7L Hemi and I really liked it. Super comfortable and enough power to have fun. It would be perfect to tow the Dart or hall stuff. Plenty of room for passengers. If I were to get one, it would probably be a Crew Cab wiht the 5'7" bed; however, that's only 8" shorter than the other truck. My biggest problem was just parking in standard shopping center parking lots. Often times you have to park far away, find strategic places to park, or really spend your time parking as you don't have the room. It's a big vehicle.

Honestly, Ram has the 20% off some of their trucks till Jan 3 or 4th. I've thought about picking up an EcoDiesel; however, I really don't want the payments as it will push me back from my next big purchase.