Ack. I missed this thread too.
I have H&R sports on my 03' 325i .. it lowered it a decent amount though the front could stand another 3/8ths an inch. The ride is much stiffer as well. If I got shocks it'd smooth out a bit but it's more of a bouncy stiff, you can feel the bumps. I like the styling aspect and don't mind the decreased comfort level.