+1, exactly what I recommend.

 

You CAN do staggered and you CAN do 19's or 20's. You want a high offset (ET35+). Don't listen to those that did not own an XI. They will give you the wrong information. Seach on my name and you will see plenty of threads about wheels for the XI. Prior to my current car, I had a 2007 530xi Sport that was heavily modded. I did a huge amount of research, prior to purchasing wheels. If you have any questions, feel free to let myself or DrLev99 know.