Hey Mike:
The best money you can spend now is by joining the Porsche Club of America (
www.pca.org) and getting active with your local region's events.
Your new car has a lot of "un-tapped" potential, that once is "harvested" you will have plenty of HP's to make you very happy.
Your local region will have some great driving events (AutoCross and DE's).
Ask "Santa" for a Snell 2005 (or better) helmet for Christmas and get ready to drive the wheels off your Boxster come Spring 2007!
This is really the best advice given by several of the members on this posting. It is not a slam against you (I need to do this too...and will...Sammy and NickCats keep asking me too!!) so don't take it too personally. You are a good driver, and can get better. You have an awesome car, and the 2 of you need to work and improve together. You have a new relationship now.
This is a great Forum and you will learn a ton. Come everyday and read all that you can. Contribute back too...and I know you will.
You might have had a bumpy start with this first post, so don't be discouraged. And I can assure you, in the future, MNBoxster (Jim) will give you great advice and teach you a new thing or 2!