Having same issues as the OP. Want to get spacers but the H&R/Bilstein combo settled quite a bit and I'm worried about rubbing in the rear. I'm on 19X8.5 ET 35 in the front and 19x9.5 ET 33 in the rear with 235 front/265 rear tires. 10mm might be aggressive but I'm thinking 5mm all round?
| ESS n52 Tune | BMW Performance Intake/Exhaust | LUX H8 v3 AE | GP Thunder 8500K fogs/corners | LED: signals/interior | V1 hardwired | debadge | AC pedals | Performance shift knob/boot | CF e-brake | Aero lip | m3 side skirts/spoiler | MB kidneys | Strut brace | Painted reflectors | Painted Calipers/Hubs | 35% 3M tint | Smoked tails | CF Roundels | 19" Miro 942 | Conti DWS | H&R Springs for xi | Bilstein Shocks| Nxt: Alpine Subs/Amps