I opted for the E150. It is a 2008, the year that they changed to payload numbers significantly. The E150's are now(as of '08) equal to an older E250, a 250 is equal to a 350 etc...
In other words, the 1/2 ton Ford vans(E150) is now a 3/4 ton van, payload wise. But, they didn't get any taller etc...
I got the 150 beacuse it was sufficient for my TM etc... on the payload and upgraded brake system etc... yet it still fits in a standard size garage in my home. Huge plus for me!!!!!!
I liked the mirrors way better in the ford over the chevy. Way easier to see blind spots in the Ford. Chevy was slightly better on gas.