The "Will it fit?" thread

[Noffy18]

Hey everyone! This is my first post on the forum, so forgive me if I sound like an idiot...
I have a Touring without the sport package, and I'm wondering what size wheel spacers I should get.
I have Kumho Ecsta Platinum tires and 18 inch TSW Bathurst wheels, and I hate how the rear wheels/tires sit inside the wheel well (the rear wheels are more concave than fronts, so the way they sit inside is more noticeable than stock). I had the rims installed in July of 2015, and I've been looking on the forums to find some info, but for the most part I haven't found any answers pertaining to my situation. Also, I am not planning on lowering my Z any, and it is still at the stock ride height from when I got it in 2014.
My preference would be that tires either be flush with the wheel well or for them to stick out slightly farther.
Any advice would be greatly appreciated, thanks.