depends on what suspension you want to run.

Up front is more critical than out back.

If you want to clear coilovers up front here is my reccomendation

17x7 run a 30 to 35 mm offset
17x7.5 run 32 to28 offset (28 will stick out a bit)

Backs can be 8 to 9 wide (some say 9.5) offset between 35 and 40

Scott