Yes, it is possible that you could have some rubbing issues with those spacers, especially the 15mm in the rear.
You're going up in size from the stock tire, and you're lowering the car. Moreover, while all indications are that the Vreds are very close to PS2 dimensions, I don't think that's been officially verified by anyone that I'm aware of.
The safest thing for you to do is hold off on the spacers until you mount the new tires and lower the car. Then you can make a more informed decision about how much spacer to use. I'm using 12mm on all 4 corners with OEM tires and pleased with the look.