I run KW CS on my car and I love them. I think its a true street/track coilover in that handling performance is dramatically improved while still maintaing a modicum of streetability.
I am putting TCK S/As on my E36 M3. TCK has a great reputation in the BMW community. They will customize a set of coilovers for your needs.
I would go KW CS or TCK... I think you will be happy either way.