Wheel Spacing/Offset Question

[achoren]

For my 2002 CLK 430:
In spring I'm changing out my existing 19" wheels to another 19" set (current set is a little too blinged out for my taste). To get to the chase, the new set has a front offset ET35. Some specs I've seen say the offset should be 28 or 29 (I think based on Brabus setup) to avoid rubbing. So the math would indicate I should go for 6 or 7 mm spacers. H&R offers spacers in 5 or 10mm. Which ones should I go with, is my question?

And now for some filler:
The new set is 19x8.5 ET 32 (front), 19.9.5 ET 35 (rear), CLS style. My fenders are not tubbed, car is not lowered. I currently have 19x8 and 19x9 both with ET35 - which rub slightly in the front - hence my due diligence now. I'm not opposed to spacing both or doing it unconventional in any way if it ads an aggressive look without looking cheap, junkie, riced out, etc. I'm not interested in a debate of ride or look of 19's versus 18's, etc. The wheels are in my garage waiting to be swapped out once the weather warms a bit.

 

[redbaron]

if 19x8 et 35 rub already - having a wheel 1/2 inch wider with less ET (further out) you will rub the arch lots more.

 

[achoren]

I guess that's where my dilemma is - they only rub right now when I'm making a very sharp, slow speed turn (i.e. out of a garage parking space); and I'm not quite sure where they are rubbing - on the inside fender, wheel well interior, etc. I've received another MB forum answer saying the fronts should be fine, and that I should actually push out the rears 10mm to maintain the aggressive look. not what I was expecting, but again I'm open to any input.