I know I was being cynical.
But for $15K, and it to be fast, cheap to run and a 4-door, I'd probably say an SVT.
I don't think I'd dump that sort of cash into an old Beamer as those suckers cos $$$ to keep running. Hondas are uninspiring in 4-door forms, Toyota has nothing worth looking at, Mazda; maybe a Mazda 3 hatchback, Nissan, a used 2000 Maxima, GM - nothing, all their 4-doors suck turds for styling, so hence why I reverted back to the SVT.
Only other thing I would look at is a GTi Golf