why focus RS?
you looking for a STANDARD car to keep costs down?
theres a lot better cars around than a focus RS, i know its a damn brilliant and fun car to drive, believe me.
but theres a lot more cheaper-faster-more fun to drive alternatives which are cheaper and easier to repair if an accident happens!

(e.g. i know its been done to death, but pugeot 205 trackcars with a decent engine transplant are the most fun you'll have without taking your pants down)

road cars are designed for the road, track cars (radical etc) are designed for the track
road cars need a bit of "tweaking" for the track to get their full potential .

just a thought