Gentlemen, In an all season, radial M+S tire, for a mid-size sedan (Buick Regal) driven by a little old lady in Michigan (Snow and sun) - what are the decision criteria for deciding which speed rating to buy? Winter driving is an important factor (but no separate snow tires). Does a higher rating give better grip/traction? If so, do you get less durability (softer compound)? Why choose a higher rating than T? (more $) Thank you. (started this thread in the BFGoodrich TA thread).