Jumping in here and I didn't read the entire thread.
Bimmerworld has the best prices for Meyle HD control arms + centered Powerflex bushings. I think it is $205 plus shipping. You don't need new brackets as long as you get the old bushings out of the original brackets. If you have a shop press, just press the old ones out. I didn't and just cut up the rubber and then sawzall'd the metal bushing sleeve. More time consuming but it was free to me.
I'm running Bilstein Sport shocks with Bav Auto springs and find the ride fine. I got them used and am not regretting it one bit. __________________ 
2000 M5 -> 1996 318ti -> 1997 328i 
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