Get on to subaruforester.org and see what they reckon!
AST are a reputable company, but it's hard to say how the peticular struts and springs will suit your car!
I have standard sti struts, with tein s-teck front springs and whiteline control rear springs!
I found the front whiteline fronts a bit hard, and the tein rears would have been to hard for me also!
I have them in the garage if you want to try them! I don't want any money for them! no use to me!
I also have the origonal STI springs but I'd like a few quid for them!
the after market ones are about 40mm lower then the sti ones, which are about 30mm lower than yours!
Dan