Should i buy Ambitions or Into the Future?

To me thats a hard one, those two go well together. You can invent a time machine in Ambitions, and you can actually use that to go to the future if you have Into The Future.
You can make Simbots as an inventor, and have your next generation be the founder of Plumbotics.

I think, if I was planning on getting both, I would get Ambitions first, if I may only ever buy the one expansion I would have to pick Into The Future though.