ive got the Goodyear Eagle F1s..
The guy at the tyre shop said hes removed a few continental sport tyres off cars before with cracks in the center of the tyre he thinks its due to over inflating and they have a poor sidewall.
I could tell the difference straight away soon as i drove away with eagle f1s, but they aint all weather tyres.
For maximum grip in the rain/snow Toya Tyres are superb i had them on my beemer and they stuck to the road in the wet so well. .
Ive tried toya, yokohoma, conti, dunlop, bridgestone and pirelli on my cars before and have to say the bridgestone and goodyear have been the best.
I aint tried the michellin pilot sport i hear there still the top dog tyres.
Id spend any amount of money on tyres to get the best available i think there the most important and basic safety mod you can do to a car could even save your life!