Could not find a definitive answer on offsets for 19" wheels for my e93 but my local tyre fitters were very helpful with advice. I wanted 19" Veemann V-FS28 alloys in gloss graphite and was advised to go for et45 offset for the rear which I thought would be too narrow (inset) but when fitted all round wheels look A1 I could not be happier with them.
FRONT 8.5J ET35 with 235 35 19
REAR 9.5J ET45 with 265 30 19
I had Falken tyres with rim protection fitted, not much wider than the wheels but better than no protection. plenty clearance at all wheel arches and still look the dogs *****.
I hope this info helps someone to choose there wheel package as all the info I found was different.
As per photo my car is pre facelift m sport 2007 335i model with standard suspension and brakes and the way the wheels fit i will definitely not get any arch rub.
Many thanks to Foxhunters Tyres in Whitley Bay for their help. If visiting Michael will be there to help you with any problems you may have.