Im ordering a set of GT-C wheels 18" 9.0 in front and 18" 10.0 in rear what tires could I use to keep my setup as close to stock hieght as possible

 

I am going with a 245/40 and a 275/35 on my 18's... And I have the 17's stock.... People who have the 18's stock are going with a 40 in the back, but a 275/40 is taller then the stock 235/50/17 so in my case I would rather have it a hair smaller than bigger... Lower height means better acceleration....There isa slight chance I may go with a 235/40 in the front just to get it a little closer to stock....