Your rear rotor is 13.4" and your front rotor is 14". I know 18" wheels will clear the 14" rotors on the front, but am not sure if the rear rotor will fit inside a 17" wheel on the back. You will probably have to do a test fit to check for clearances.
Here is a pic for reference (Left is C6Z 13.4" rear, Middle is F-Car 11" front, Right is C6Z 14" front). 16" wheel is the minimum for the 11" brake system without mods (people fit 15" wheels on them if they grind the calipers). If you can get a set of 17" wheels, do a test fit and see if they clear the calipers.