Should I Buy another Boxster

[seningen]

I would sell your current one,

go backwards and buy a low mileage 03/04 S
Find a good independent.
do the IMSR, change the water pump, and do some other
general maintenance

Now you have a more reliable car than your 07 (IMS wise)
and probably have $10K or more in your pocket to cover
any general maintenance AND you've got only $20k of depreciation
to worry about.

It won't be an '11, but still a pretty darn good (and reasonably priced) Porsche!

Mike