Fresh... Fatalii (Excellent heat and great taste)
Powder and flakes... Red Savina Habs (Excellent heat, easy to dry, & not as pungent when dry)
Canning... Super Chilis and Mucho Nacho Jalapeno (Good heat and prolific)
Sauce... Haven't made any yet, but I would guess 7 Pod, Bhut Jolokia, or Naga Morich (Going to try some sauces this year... just thought these would work well)