COBBERS wrote
Expensive 'better' tyres are a myth, go for the cheaper (softer) option! They will grip the ground better with them being soft...they wont last as long, and will slightly decrease your handling, but will do a better job with acceleration.
Cheaper doesn't always mean softer and softer doesn't always mean better. With a high-performance car you need good rubber to convert the power into acceleration, and to handle and stop well, in dry and wet weather. Choosing tyres is never easy, there are so many on the market and all make great claims. The best you can do is read
reviews and ask for advice, on here for example.
Advances in tyre technology and composition are the root of almost all the improvement in car performance over the past forty years. Everything else depends on how well the rubber grips the road.
I will agree that the most expensive tyre is not necessarily the best either.
I buy cheap part worn tyres for 25 quid each, and I beat M3's off the mark
Of course the second factor in any drag race is driver skill
Plus you don't know what tyres the M3 has on.
I hope your part-worn tyres still give good stopping power in the wet?
I have Mohawks on my TDI 150, fitted by the previous owner. They have given me no cause for concern yet, although I haven't had much opportunity to test them round twisty bits, recent weather has not been cooperative. I have tested their stopping power, crudely, on a wide, straight, empty road, and was satisfied with the amount of deceleration I got before the ABS cut in - I was pushed hard against the straps. I really don't know what I'll replace them with though.