Suspension time

My new to me 2001 330Ci with Sport package has a dying rear passenger shock....oil leak. The car has 125,000 kms on it so thinking it's time for a refresh. I currently have about a 2 finger gap on front and 1 finger rear(drivers side), and don't think I want to go too much lower.

Looking at either Eibach Prokit with Koni FSB's or H&R Sport Cup kit. Everything else seems tight, but looking for input on the following:
1) Is front upper strut mount reinforcement plates over kill if I also get a front stress bar....Looking at ECS tuning for both of these
2) Will also do RSM, but wondering which RSM reinforcement kits fit convertibles? Or is modification always required.
3) If I do go with new Front control arms, was thinking OEM ZHP ones, but what would be the better FCAB's...Powerflex, Meyle HD or Rogue engineering, and what size, 60 or 66mm?

May do the occasional autocross, and potential Driving school but the rest is daily driver. Since I'm also shopping for E36 to be the track toy.