As already mentioned Michelin Muds are a good tire. I know a few guys who have ridden both Ritchey's and Michelin's and most strongly prefer the Muds.

I'm a big fan of Tufo Tubular Clinchers with the LPS system. You can run them down around 30-35 pounds and they stick like crazy in cold and wet conditions. Some guys have had problems rolling them off the rim remounting but if you're smooth it shouldn't be a problem. The current Jr National Champ runs his so soft they almost look flat at the start line.