Bros and sis,
Just to share my experience with Bilstein. Besides my E39, I drive a 2006 Civic on Koni FSD. With E39 stock spring/abs, like many of y'all say, drive like a dato, that makes my Civic a better cornering machine.
Recently I changed from B4 to B12, now my E39 drives like a sport car and Civic drives like a dato instead. Best things is, B12 was tested and comfort-approved by my family. Whereas my Civic with GAB SS was a total failure (only used for 30 days and sold).
In brief, B12 rocks, get yours today.
PS: Now my stock 16" rims look funnily weird or weirdly funny. Hunting for 17"s.