my wheels are 17x9 4.5bs and i'm looking to at the same setup you're describing (37, GC and overlines). as much as i don't want to run a wheel spacer, bora makes them as thin as .75" and are hub centric. i'll likely go with a 1" so i'll only have to grind down the very tips of my bolts. if the wheels you want are not hub centric, bora can also customize the spacers to make it so.
just an option you have that will allow you to run the wheels you really want instead of settling for just something that won't rub.