Well, I really like buying from Heather's Herps & J Kobylka Reptiles just in general. And I like buying from my local breeders in AZ--no shipping, stresses the snake less, I get to meet the people in person who share the hobby and live in the area. Lots of people have really nice pieds, so you can shop around and find the one you like from a breeder you like.
Fires: I'd probably go straight to constrictors.com. Axanthics: I like to see axanthics in person if possible, but if not... well, mine came from Brian Sharp. I have a friend who says she likes the look of Bradford Cole's VPI snows, but I've never bought from him. I also like the idea of the NERD axanthic line, but I've only seen hets for sale.
Phantoms, man. Who can afford a phantom? NERD, I guess. If I didn't just skip straight to a mystic.