Dude, Íhlins all the way. I've never driven a better suspension and I've had it for a year now, with quite a few laps on the 'Ring.
BTW, does your Birds kit also fit a E91 330d? In that case I would also be interested.
335i E90 - azurite black - Merino Champagne - ALPINA aerodynamics package+19" rims (2010 design) - Helix FMIC - Forge DVs - ar design catless ceramic coated DPs - HJS secondary race cats - Bastuck quad exhaust - BMS catch can - Performance Friction BBK - UUC SSK+DSSR - Quaife LSD - M3 conversion - Íhlins Road & Track - STETT CP - COBB ProTuned - Snow meth kit - Rixster Boost Gauge v2 - VAC diff cover - mods review