welcome to the club, as far as im aware all sports came with the rear spoiler, i know mine has one. the S & SE do not have spoilers. someone will correct me if im wrong though.
not sure what your budget is, but it could be worth looking at a pre 2001 car if you dont have a large budget, so it doesnt take the hike in the recent road tax rises.
as for MPG, im currently getting about 32 mpg which is mainly country lanes at a leisurely pace