19 " Wheels for 550ix M-sport?

Help...my car was feeling a bit rough at speed so I took it in for a wheel balance. Bottom line - I had 3 bent rims. Ugh. He showed them on the machine and 2 were very poor. 1 was average and 1 was good. I think this damage happened last winter before I got the winter tires.

So I am thinking about new wheels. I already have 18" 350 style rims for winter and I think I will stick to the 19" rims for summer. I actually am not a big fan of the 351 style that came with the car.

I am trying to figure out what my wheel options are. I actually like the look of style 349. Its also an option on the 650.

Has anyone a list of what BMW wheels will fit the M-sport 550ix?

Has anyone gone with style 349?

I think they are 245/40/19.

Has anyone gone to 18" wheels for the summer? I prefer not to do this as the summer PSS 19" tires are still good.

what about OZ ? Tirerack is running clearance the Ultraleggera HLT.

http://www.tirerack.com/wheels/Wheel..._25&sort=Brand