My vote is to allow the Scalextric Pro cars. They come with all the mechanical parts you would need to fix a regular Scaley at a much lower cost, the drawback is that all Pro cars are white kits and will require painting.
Now, the Lamborghini Gallardo GT-R was only made as a high-impact car – we need to scratch that one from the list.
If we are calling dibs on cars; my car is the Audi R8 Phoenix Racing:
