Don't forget that it's a GXP though, anything that comes with a mileage tag saying they will last 40 or 50k miles you can toss that out the window. Getting any of them to last that long is too hard because you can't rotate the stock size tires/rims front to back.
If you had matching 18x8's and ran 245/45/18's on all 4 corners with non directional tires, then tread life will improve alot.