Heh the finance office tells me I'm wasting my Box

[Perfectlap]

I've driven all manner of Mustang. the only people who get in trouble in those cars are bone heads. Like pulling the trigger on a .50 caliber hand gun.
A Boxster, even a 2.5 can get you into a lot of trouble. Once you get it going you start getting this false sense of security if you really don't know how to drive at those speeds. And by driving I mean actually turning the wheel past 45 degrees.

p.s.
Do the the autocross before you take a driving course. You'll learn 90% of what you will learn paying for $40 day of Autocross that you will learn paying 20X's that on a driving course. It will take longer with the Autocross because of the limited runs but as they say safe Autocross drivers make for safe track drivers.
And after one day of Autcross you will have become a 1000% better driver than the average bloke on the highway.