So I just went from the PSS to the RE71R. So far on straight line performance, the RE71Rs are awesome. Where the PSS couldn't hold 1st and 2nd in my 300ZX, the RE71Rs just grip. I had turned down the boost in 1st and 2nd gear, but I think I'll be modifying my gear based boost map to go back to full boost and see if they hold.
So far, very impressed.