If you sell the H1, that should cover the duties you "could" pay on the Boxster. I strongly recommended you talk to someone like "Pib" about the pro's and cons of doing what your thinking.
Also add into the mix that you will be flying in service people from Miami to look after your cars and maybe your boat.
When they roll out of the container, you will be the most popular man on the dock, it will be just like Christmas bonus all over again!
I hope all goes well, I have never driven a Boxster
