There was a long discussion on this board about a week ago about problems with PASM. You might check the archives. And some "authorities" in the UK and from Porsche were quoted as saying the reg. 997 with reg. (not PASM) susupension was a better handling and driving car. 18s with PCCB brakes on a reg. 997 was considered optimal.

If you buy the reg. 997, one decision you must make is 18s or 19s. If you drive any rough roads, I would suggest 18s. I have 19s on my 997 and am looking to replace them with 18s for this reason. On a smooth road, they're fine. But rough patches, pot holes, etc,. and it rides a little hard.

Good luck with you decision!