simple one really in my eyes, if you can afford it you have the s2 for shows, weekend driving and a fast xr3 turbo which you wont be bothered about getting scrated by gravel or the odd ding for the track. If you cant afford it then it would be a shame to end up making a mint car tatty, but at the end of the day it is up to you, what ever makes you happy is what counts mate.
You could always just give the car a freshen up in the winter months? just look at the gobstopper, that gets hammered round all the tracks yet it is like a show car.
Keep it and get into a routine of freshening it up once in a while I say, cheap and also keeps you occupied