I would, but I have only worn the premium version and I don't want to experience any more clamping force. Furthermore, I am a vegetarian, and involved in animal rights activism, and as such cannot purchase something first-hand that has leather (the case has leather).
As someone else pointed out, the Pro version does not come with a leather case (its nylon). Its the Premium versions that come with leather. And if you don't want more clamping force than the Premiums then that excludes almost every other headphone out there. ;) Personally I prefer the tighter fit of the Pro, especially after several months of use (the Premium gets even more loose and the Pro starts to be just about right).