Recommendations for touring suspension

I have a 520i touring without SLS and i'm looking to upgrade the suspension to make it feel a little sporty with a slight drop in ride height but still comfortable. I've read through posts and forums and everyone is suggesting Sachs but i have not been able to find rear shocks anywhere. Other suggestions i have seen are Konis and Bilstein B6/B8, ive read that Bilsteins make the ride very rough with lowering springs and only review I've seen on Konis are about the adjustable yellows which are also discontinued for I6 E39. So any shock/spring suggestions?