Thanks for the responses guys-couple of questions:
1.Ok. It looks looks like I'd have to change the springs as well if going ZSP. I don't think I'd be interested in the BMW Performance parts as they would be too stiff. So if I went with the ZSP set up, I'd be wise to go with the springs as well. Figured. Does the ZSP shock/spring set up work ok with an otherwise base set up?
2. Would the Bilstein B6 option or FSD still be the best choices if I wanted to keep the stock springs? I don't really want to increase the ride height, but a minimal increase wouldn't bother me.
Thanks again all-