Best Tire Size Upgrade for 360

Can anyone give me some feedback on tire sizes. I'm thinking of changing my stock tires to 19" with 235/35/19 in front & 285/35/19 in rear. I track the car & want better sidewall rigidity. The look doesn't hurt either. Anyone who has changed their tire/wheel combos please respond with the size they changed to, the change in handling characteristics, and did you have any problems (rubbing, abs, speedo, etc.). Thanks.