I just want to mention to check the wear of the dual-mass flywheel. Depending on your mileage, it may need to be replaced even if the surface is fine. Its not unusual to have to replace the dual mass flywheel if the car has more than 50K miles. And sorry, but yes its expensive.
This is from the Pelican Parts website:
Pelican Technical Article: Boxster Clutch Replacement - 986 / 987
"Porsche Tech Bulletin 8/02 1360 says to check the dual mass flywheel by twisting it approximately 15mm to both the left and the right, checking to make sure that it returns to its approximate starting position. If the flywheel can be twisted beyond about 15mm with no noticeable increase in spring force, or if it cannot be twisted at all then it probably needs replacement. If the flywheel checks out okay, then replace the flywheel pilot bearing and the flywheel seal as shown in Photo 9 and Figure 10."