Tokicos don't last very long. I had them on my old e36 and they went after 18 months, first the front shocks then two months later the rears. Stiff as all hell. I VOTE BILSTEIN.
Don't know about springs, sorry.
"If everything seems under control, you're just not going fast enough."
- Mario Andretti
1979 320is RiP
1994 318is Sold
1995 325is Sold
1995 530i Sold