Go with a 225/35/19 up front and a little negative camber if you dont want to roll the front fenders. Go with 235/35/19 if you decide to roll them. If you roll the front fenders you might as well roll the rears and add a 12mm spacer.
2006 BMW 325i Titanium Silver
Mods- 19" AG M310's hypersilver, drilled and slotted rotors, OEM rear spoiler, OEM exhaust tips, corner delete mod, carbon fiber wrapped trim, Viper 5904 Alarm + remote start
Audio upgrades- Alpine S920HD, JL XD600/6, Jehnert XE200, Morel Hybrid Ovation II, Audioque 2200D, 2 Alpine SWR 12d4's (forward facing sealed from trunk)