Hey I found this site very helpful in calculating rims & tires combination:
http://gs.tolan-hoechst.com/tirecalc.htm
Going from 18 x 9.5 +35 to 18 x 10.0 +38 with 255/35/18 tire gives the following changes:
Wheel Inboard increase (inches): 0.368 Wheel Outboard increase (inches): 0.131 Tire /w Wheel Inboard increase (inches): 0.118 Tire /w Wheel Outboard increase (inches): - 0.118 Effect on tire track (inches): - 0.24
The changes were actually much smaller than I thought it would, but anyway if the 9.5 was extremely tight, then this might just be the borderline when it start rubbing. What do you think?
To be on the safe side, looks like 17's would be better to go for my application. I'd most likely get the (Work Metal Buffing) chrome finish to have a bigger contrast with my navy blue car