Which suspension mods for BMW M3 (E90)

I have the EDC on the current V8 Sedan. Supple, with fairly flat cornering when set on the stiffest setting. However, still a bit soft for those of us who like more firmness, less dive under braking, etc. I had a fabulous adjustable TEIN FLEX system on my EVO III.

What have people done regarding suspension mods that will work with the EDC–I assume Dinan and some others? I would be interested in how the car feels and turns in with a stiffer, lowered suspension.