Surprised that you say this. The feedback of the forum members is that if you go with 245/35-19 and 275/30-19 gives better handling than the original setup. Do you believe the original setup gives better handling or have I misunderstood?IF you want maximum performance/handling, stick with the sizes that are approved for your factory wheels.
If you want to plus size I suggest going with 245/35-19's in the front with size 275/30-19 in the rear.