To the OP; You've mentioned gas mileage 4 times in your posts which seems to be your main requirement. In all honesty, this should be one of your lowest priorities; Gas is around $2.00/gallon (roughly), so the difference between 15mpg and 20mpg is not going to "break the bank". I would re-assess you priorities, get the best van for your other requirements first. You will regret getting the wrong van which does not fit your other requirements but get great mpg.
I have a Chevy350 van which get 17mpg unloaded and 10 mpg towing a 27ft camper. Do i care that it "only" get 10mpg towing? NO. Because it tows like a dream and I can fit all my toys in the back.
Take a look at the domestic full-size vans with a High-Top conversion. I've had 3 Chevys and 1 Dodge with the hi-top - you can get good ones in your price range.
My next van may be the Transit but at the moment they are outside you price.
