jroptop

So, I finally got around to getting my staggered style 124 wheels powder coated to factory color for my 2010 528xi. I figured Id ask as an update, as in my searches I have come across a few different options other members went with as far as lowering springs and wheel spacers. From what I gathered, H&R Sport lowering springs with 10mm spacers up front and 15mm in the rear. Its difficult to tell by the photos posted, but has anyone gone with different size spacers, such as 10mm front and 18mm rear, or 12mm up front with 20mm in rear? I don't want anything drastic, or rubbing issues once lowered, if I have passengers in the back seat. Give me your inputs and experiences of what looks best, thanks in advance!