We love our 25' MH on the Chevy 4500 chassis. It has plenty of power, lots of leg room in cab, and handles very well without modification. We get 10-11 mpg on interstates at 60 mph, with full water and propane and lots of stuff for two people.
Chevy chassis has a lower front axle weight than Ford E-450, so you will not find it used on the larger class C's. Chevy engine is forward compared to the Ford, resulting in a smaller doghouse inside and a slightly longer hood outside. We drove both before buying and selected the Chevy for passenger comfort. We have not been disappointed in any way. Not to say that there is anything wrong with the Ford--just different.
