I have 15x7 0 offset on the rear and they fit fine, i dont have the coilovers thou. I was mucking about under there yesterday and id say with 90% confidence that those rims would work for you.
A small 10-15mm spacer would help if you got stuck.
195 tyre is as narrow as id go if you still want the tyre to help avoid gutter scratch on the rims.
185 would be strecthed but still inside what most would call reasonable stretch.