The price at Summit seems reasonable to me, if it is indeed $180 for the pair. Regular RS9000's are $90 a piece whenever you look, so even the $150 at AC doesn't seem too ridiculous since it is a strut, not just a shock (though the huge price difference between the two vendors makes me wonder if somebody isn't pricing them wrong). If you wanted a lift and different shocks, I think this would be a very good option. I think I'd prefer a spacer lift still, though, on an OR anyway. I don't see the point in ditching a perfectly good set of Bilsteins (though I'm sure they would be easy enough to sell, which would cause you to break about even probably).
What is with the differing lift heights listed on AC's website, too? Not like it is adjustable (lift). Obviously they just raised the coil seat a set number of inches.