I'm looking for the stiffest Pro Staff (in the 6.1 line). I have only played with the PS 6.0 95, PS 6.1, and KFactor KSix-One 95 16x18. And while the KSix-One is listed as a stiff racquet, it didn't feel as stiff as its rating is. The original PS 6.1 felt stiffest of these 3, but I was seeing how the nCode and BLX were in relation to the KSix-One.