With money out of the way, I have to agree with Sapphire and say Space.

If travel time wasn't an issue, then Buenos Aires and the rest of South America.

More realistically, I'd like to spend a month or two in northern France, maybe Alsace. And I'd love to return to Laos and Cambodia to explore more-- they were both amazingly welcoming and affordable and I didn't budget enough time the last time...

I can't wait to see what other folks come up with!