Hi, ive been searching a while for winter tyres for my bmw 535d. They are 225/55/17 y on run flats. I looked at michelin alpin pa and a4. However spoken with camskill and unavailable apparentley for my model. They have said dunlop 3d or the pirelli. Can anyone vouch for either of these and what they are like in comparison to the michelin? Cheers.