The EPA sticker for the 2010 SE is 25 mpg for highway. Where did your 20 mpg come from? Is it an average of all driving? My SE routinely gives me 22 mpg overall and 26 mpg on the highway. It is a great car. Far more roomy than the Mustang, more comfortable than the Camaro. Price is much better than the well-overpriced Camaro and exterior styling is easily my favorite of all the pony cars. The quality is much better than I expected.
Exterior styling. Huge number of aftermarket parts available. Very quiet and smooth ride.
Dual exhaust for the V6 which has already been done on the 2011.