Thanks for all the replys guys, I think I'm gunna like it on these forums!

I got an insurance quote a few weeks ago for around £1500 from 'elephant' but that's for when IM 21. Which to be honest I don't think that's too bad considering I paid £1900 for the 1.6 Fiesta Zetec S I have now. So I'm willing to pay that price for the GTI.
It's the price of the car + options that's holding me back more because I'm gunna have to pay the monthly payments for the car because I can't afford the car outright.