Thanks for the input, lads. I've been on sxoc, and I think my budget/requirements are definitely S14A, not S15. I want to keep to the 5K mark so if it all goes wrong, say at the Nurburgring, then I'm not too much out of pocket.
I will want to tart this bitch up tho, so a respray + decals is on the cards! Leave the Z stock