Chris, i have bilsteins in the car now, and when you rode in it last at your place. My height is approx 350mm from centre to wheel arch (ive just rechecked it recently) I have 225 50 16 rims (8.5 rear / 7.5 front wide) its not a harsh ride, like coilovers, but not as soft as std sus. About as hard as you would want i say. My car had been tuned to about 200 rwkw when you rode in it too, so that may give you some feel on what its like with the 16's.
Personally im hoping to go 17 x 8 and 17x 9 on the rear, later down the track.