Tony , nice thought with the tuning of the GP although like you stated beforehand , your looking at £30,000 again! ahhh , we've been here before havent we!
Initial purchase price - £22,000 (at least!)
Brakes - £1,500
PSS9's - £1,500
Engine tuning package £2,500-5,000+ (depending on state of tune!)
Wheels + R888's £1,500
Total = £7,000-9,000!!
HMM , i can supercharge the M3 and have 500hp for £7,000
Saying all that , i could just leave it standard as its meant to be and use it , but why would i want to do that