I would stick with the OEM even if I tracked the car.

Usually you would want an aftermarket clutch to increase your torque holding capacity.

If you are riding the clutch too much, slipping it too much, etc etc then probably the aftermarket will wear as fast as the oem one, if not aster because of the increased pressure plate strength and the different material. Plus almost no aftermarket clutch has the drivability of an oem one...

Track wise, launches kill the clutch more than anything... Unless you own a 997tt or similar I wouldnt even bother with aftermarket...

Maybe a gt3 unit if it fits...

For those that have done OEm clutches, whats the cost?

I had mine done in October by an indy. The total job was $3500 but that included a new slave cylinder, clutch disk, pressure plate, release bearing, oil change and spark plug change. FWIW my clutch failed at 33K miles due to a defective part, not abuse. Once that happened it smoked the flywheel immediately. I went with a new OE clutch in hopes they've corrected a quality problem. I'm starting to see more and more failed clutches due to a fatigue fracture on the pressure plate.

I just replaced mine, with new oem clutch and new oem flywheel.

I believe mine was $1700 without a new flywheel. A new fly wheel would have added about $1K. I used a local indy who does great work. Dealership surprisingly was not that much more.

Correct. Also when you replace clutch (and optionally flywheel) - it is worth also to replace RMS and replace AOS - either with same stock or with motorsports version.

At same time you can install LSD or TBD if car is mostly used for street or ax.
If car is 2005 or earlier - another 'obligatory' job is to replace ims.

You get the idea - when tranny goes down you replace all you can access, aos is the most important item as it is recommended to swap it every 30k miles or so, and it is usually recommended to put in motorsports version.

My car is an '05 but was a later build and has the newer style ims bearing. Otherwise I would have had that done as well. I did have the rms changed which was only about $20 while they already had the transmission out.

Yep very much!Some one has thrashed it!

Does Porsche recommend to replace AOS at a specific maintenance interval?

I do not ride my clutch and I had the pressure plate crack! after 30k.
The quality might not be what it used to be.