Lowering Springs...

I'm looking into some lowering springs - both to stiffen the car up and sort the fitment a little. That might look a little silly fitment wise, but as I'm not keen on spacers, I might look at lower offset wheels.

Lowering spring wise, what are we all running? I've been looking at Eibach, etc, however am more keen on the adjustable version from KW or the Bilstein kit. Something like a 30/40mm drop is too much for me, as the car is used in some questionable car parks. I'm keen to do more 10/20mm.

Any experiences appreciated!