This will probably get howls from the crowd.
I live in the Bay area myself, and ski Tahoe on a regular basis. I drive a '99 A6 Q --- a lot. I replace tires before they get anywhere near the wear indicators. For that I go to a reputable independent tire shop and get their cheapest "H" or "V" rated all-season tire, that means M+S, and put them on the car and drive. If I don't like them, I can take them back immediately, I make that clear when I accept their recommendation.
I've always been happy.
In fact there is a set on now called "Le Mans HR", they cost $73 bucks and are every bit as good as my old Dunlops that won the Consumer Reports test, and better that my older Continentals. (though I hear the ContiExtremeContact are good)
Good tires are good, a great tire shop is better.
Grover