You are looking at 18's aswell mind, so yes it will sit even closer than a 17 inch rim et45 would sit,
I have et 45 x 17"and pretty neutral camber and they just fit on the rears without rolling. (lowered on springs) You need to look in the thread that's been created to help show all variations of sizes and fitment specs etc. It will show you an idea.
"wheels - what fit and how they look" I think its called? But 18s generally come in more aggressive offsets etc so it will be tricky. Just out of curiosity why 18s?