Marathon Pluses are HEAVY and SLOW, but unstoppable. I wouldn't recommend them unless you truly and utterly hate the idea of fixing a flat. If you're looking for a nice blend of speed, comfort, and puncture protection I'd recommend Marathon Supremes or Vittoria Randonneur Pros. They make them in 32s (the rando pros in 35mm actually measure out to be 32) too. Heard a lot of good things about Gatorskins as well.