Well, it would look rubbish, you'd have to run some odd tyre sizes and they're probably even heavier.
The touring 18"s are et 30, 8j, 225 at the front, 245 at the rear.
You can get many, many suggestions on fitment. Maybe something like rota gtrs in 8.5" et 25, 9.5 et 12 would be quite conservative, shame the fronts don't seem to have a reasonable offset available (something ~20/lower would be better).