For 245/40/18 tires, getting the pricing from tirerack.
PSS is $258 for 300 treadwear
Hankook RS3 is $177 for 140 treadwear
So if you're going for value PSS might be a better deal. If you want more track oriented tires RS3 or StarSpec are both great choices.
Oh and my favorite tire calculator is
tiresizecalculator.info because it shows you all sizes within a % you specify of rolling diameter.