New Duster / Mod or restore?
I understand the dislike for big wheels, but IMO 17" on a Duster aren't oversized, just modern. And you can't get very many modern performance tires in anything smaller than 17" anymore.
I think the 17's are more proportional anyway. If anything, I think an 18" in the rear is a good look also on a Duster, since the haunches are a bit "big" anyway. The only rule I have is I want 4" or more of sidewall. Anything less and you start having problems with bending wheels and they start to look like rubber bands.