There may be some resistance to the wide rims due to fitment. If you want to stay stock or relatively stock, the wider rims wont do.
Not really a case of "dont look right" rather the additional things needing doing so you can use them.
Well, this is the case for me.
Additional things that need doing? Like what exactly? Regarding the "must look stock" argument, you probably wouldn't even notice until it was pointed out to you.