Welcome GriffsUp
That’s a remarkably tidy mk3, is it a particularly low owner and low mileage car? Will you use it much?
One thing I’d recommend with a mk3 is getting some gas dampers to take the wallow out of the ride without firming it up too much, no need to spend a fortune on a spring and damper kit if the original springs aren’t broken. Plus check all the bushes are good, the mk3 GTI had something VW called the ‘plus axle’ which was supposed to add some agility to the rear suspension, to work properly the bushes would need to be in decent condition. Mind you the factory spring and damper rates took away a lot of that agility!
On an R reg yours will have the later SIMOS fuel injection which does make the car drive better than the earlier ones, they’re pretty good on fuel too.