I've used my 17" Hankook (Ventus) Tires in snow and they are M+S so that made little difference between them and my stock Pirreli M+S All-Seasons. (Well, the stocks are only 100mm narrower) If it weren't for the fact of curbage I'd leave them on.
1992 Ford Escort LX-E
-Tracer LTS spoiler
-GT Grille