[MR///M3]

Hey guys,
I need some help regarding what front tire size. I searched a lot, but not many people run 18x9.5 et15 front wheels. My FRONT wheels are 18x9.5 et15, so they are aggressive. I was wondering what tire sizes would be best on them. I don't want them to be stretched, but I don't want them to rub (I'm lowered on RD springs). I already have my rear tires narrowed down (285/35/18 on 18x10.5 et20 wheels), I just need help on the fronts.

The tires will have a somewhat rounded sidewall (they won't be as square as hankook r-s3's, ad08's, or re-11's).

Sizes to pick from:
245/40/18 - stock size
255/40/18 - 0.3 inches taller, would it still fit up front with no rub?
265/35/18 - 0.4 inches shorter, but wider, I'd ideally want these if they'd fit because they are the same amount shorter than stock, which matches the size differences in my new rear tires (285/35/18) vs stock (265/40/18)

Thanks,
Matt