PSS are at least $100/tire more than V12 or Vreds. That's a 50% premium from what you can get the V12 or Vreds for. If that's worth it to you, then by all means buy them.
I have a set of track tires for the track, so I don't need that last 10% of grip that I wouldn't be using on the street anyway. I know the PS2's melt at the track and the PSS are suppose to be better, but from what a few people have said here and on other sites, they will melt too.
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."