Square Flush Setup
 

I was wondering what the best wheel and tire size would be for a flush fitment with no rubbing on tein coilovers with a 1" drop. I was wanting to upgrade to 18 inch wheels and don't want to run more then 2 degrees of camber, I am also not interested in spacers and prefer a square setup because this is my DD, Thanks!

It all depends on what you want, what your budget is, and what you consider flush. IMO, 18x9 +35 is a good place to start. 245/35/18 tires fit nicely on 18x9 wheels and are stock OD.