That sway bar has the factory type geometry and attaches to the stock LCA sway bar mounts? Hellwig made a sway bar that has kinks in it for additional tire backspace clearance.
IMHO, I'd go with the 245/50/16 16x8 5" bksp up front even if they rub a little at full lock to lock. You'll never be hard performance cornering at full lock unless you doing a Hail-Mary maneuver to correct a spin. You could even add 1/8 or 3/16" spacers if there is outside fender lip room. For extra insurance.
I've run 245/50/15 with 4.5" backspace without rubbing (but real close). The extra rim diameter of a 16" may help some.
Just me personally. I always want the biggest tire I can to grip corning and stop fast.
