D3 S8 offset question... PLease help!
 

I am about to upgrade the wheels on my 2009 S8. I found the wheels I want, (Forgestar F14F 20x10) on all 4 corners. The offset ranges -30 to +75 for this particular wheel. I know that the stock 20" I have now are 45mm at 9" width, however the increase of the width should change the number.
How low of a number can I go to without affecting the bearings by extra stress, while getting the most aggressive look?

P.S. I am aware of the fact that I will need to Vag com the suspension to lower it, not yet done.

THANX!