I'm Not an expert yet.... but ten inches in the rear sould give you improved acceleration... if the wheels are the same weight as you have on now. I want 18x9 and 18x10s almost what your getting, but no money right now. just my thoughts on it
also I know your in the Vancouver area and was wondering if you could recomend a good shop I could check out. thanks. ps sorry bout the hasty post with nothing new, my bad.