[zugellos]

So I've been soaking in a lot of excellent information from fellow enthusiasts recently; from the likes of LACSTER and remmib (just to name a couple).
The information I've been interested in pertain to wheel sizes & offsets that work best for our cars.

I'm just about ready to get my new set of rims, however, I'm wondering if I can get away with going with a wider/lower offset wheel than is standard. The wheel I'm eyeing now is the Rohana RC7.

In GetYourWheels.com's site, it shows that for my 2011 F10 I can do:
20x9 ET35 fronts
20x10 ET40 rears

However, I noticed that the 2012 F10 is permitted this setup:
20x9 ET35 fronts
20x11 ET28 rears

I'd much rather have the 2nd setup, since it would probably have a more concave look for the rears; besides...I want the rears to be as wide as possible.

May I get some input from you all as to the feasibility of this?
Has anyone done this?

Thanks in advance!