If I could afford such a trip, I'd do it over and over. We'll see though. I'm only 35, so I have (presumably) lots of years ahead of me, and my job is nomadic to an extent.
I would also probably want a tour partner for that. I'm fine touring the US and Canada alone (I actually prefer it), but around the world? It would be good to have some company, for a variety of reasons.
Next year, when I'm more settled in, I would like to tour NZ, Australia, or Japan. We'll see where it goes from there.