[Perfectlap]

That's a shame your inclined to sell it. But its a great time to buy a second hand Pcar, maybe the best ever. Not sure I would swap for an air-cooled Porsche. That's not exactly going the lower maintenance route. I myself am leaning towards waiting for 09 or newer 997 (I only buy used, low miles) but selling the Boxster is out of the question. It has its flawes like most any Porsche but it does what it was designed to do very well. I'm not sure I can think of too many cars whose creator was so worried that it would be so good (or should I say too good) that it went through the trouble of putting in a smaller engine. That might be a first.

As to people waiting to put in the newer IMS, I think it's really a bad idea to wait for the clutch to wear out. So you pass up the last couple of years of clutch use.
Better to forgoe $400 of value (assuming you get 6 years out of a clutch at $1200) and avoid the expense of a new engine. Even if you do swap the clutch prematurely you still have a new clutch to put down the power and you have reduced your vulnerability dramatically. Not to mention a big worry is off your back. This is an easy repair for any Porsche specialist. One guy did it in his garage without a lift, without special tools and without any experience taking out a trans. Wish I was that handy, would have saved me $2K.