255/30/19 should be factory and what I had. Mixed with 235/35/19 on the rear.
If you don't stager the tyres you end up with lots of understeer in the car. Also experiment with 44psi in front and 39psi in rears. This might depend what suspension your running vs how you like the car to respond.
Tyres wise, I destroyed a set of PS4's in less than 7k miles. They are pretty rubbish and have worn badly, will not buy again. Currenty testing out the best in market - Continental sports contact 7. They are harder ride but they bite better going into corners and launch better off the line. Yet to know what they are like in the cold.