That sounds like a great time driving across the county in your new car. I was thinking about driving one from mid Ohio to Eastern PA but that deal fell through, ~600 miles. I'm a recent owner of a Boxster and I have read this forum a times over. There are many different opinions on the IMS, I was IMS paranoid. I have always wanted a Boxster, saved for awhile, searched for awhile for the right car and just didn't want to think about it so I factored that into my what I wanted to spend. For piece of mind I changed mine right after I bought, 'luckily' I also needed a clutch and flywheel so it was sort of like addressing it when I needed a clutch
Anyway, I do not think about it anymore and really enjoy the car. You will have to decide your tolerance for risk. You can be like me and change it right away or wait until you have clutch issues (sort of like me). Then you will get to decide which IMS to use.
*** yellow Boxster are very nice looking