Like others have said, it depends on how you drive and what you do with the car.
I've never driven on Cups, but from what I've heard, if you do track and street, it's about the best there is as a compromise.
If you do very "spirited" mountian type drives, but not much track, I would get the PS2's.
I just put a set of Invo's on mine, and for 95% of the driving I normally do, they are great. They hook better than my PS2's ever did as far as putting the power down. They do have a softer sidewall and you will notice a little more of "floaty" feeling when you're going pretty quick through turns. The problem I have found with the Invo's is that last 5% when you're really running hard in some twisties. You really notice the soft sidewalls and it can feel really spooky when pushing hard. If I'm able to keep the revs above 4,500 and keep good driveline pressure on the tires, they are pretty predictable (though still not as confidence inspiring as the PS2's). It's when you're not really keeping them loaded, that they can bite you. Obviously you don't ever want to lift in corner, but these make it a lot worse. Even low RPM, fast corners make the rear want to come around on me.
The more I'm getting into corners and thinking about road track time, the more I wish had the PS2's.
