If you want 'something interesting' then go to Germany and buy a 2-3000 Euro VR6 Syncro, some good quality coilovers, rebush it and get some track day rubber on it.
Any £6k R32 will need the struts and bushes replaced anyway, so start on something you won't take a bath on come resale time.
Let me know if you need the name of someone who can circuit prepare the car for you, if you don't have time to do so yourself.
Your money will be better spent on preparation than buying an expensive base car.
Go mobile.de and see what you can find.