I love stance for the fact that they, at least for the FC, provide better product than Tein (no EDFC though) for the price, and the coilovers are also beefier, and hold up to abuse (read: drifting) better. Stance really are great, my friends run them on their S chassis cars and both love em!
Give Touge Factory a call, they distribute these in the midwest, and I think they can hook you up with different spring rates. I remember reading about asking for different rates when you order, and like 2 or 3 choices were offered or something.
PS: It might have just been an initial order thing, but give these guys a call anyway, will ya?
http://shop.tougefactory.com/