Current:
Late Fall > Early/Mid Spring: Panaracer Pasela TG Folding (32)
Mid/Late Spring > Mid/Late Fall: Conti GP4000s (25; the new 28 this year if I can get 'em)
Possibly:
Thinking about the new Compass (Jan Heine's outfit) 28s or 32s (can't remember the names offhand).