UK vs US PhD degrees and career options?

[misterwhy]

How are UK vs US PhDs/DPhils viewed in terms of future career options? I'm from the US and am considering UK programs. I'm not totally sure what I want to do post-degree, but I'm open to a wide range of options besides a traditional academic career. I can see myself going into policy, think-tank work, teacher-training programs, etc. I'd like to research and write on education but am open to lots of ways to do that.

Would I be shooting myself in the foot by considering UK programs? By "shooting myself in the foot," I mean limiting my options. I've read forum posts that indicate it's not a great idea, but I spoke with an education professor (with whom I'm writing a book) and she indicated that she thought it would be considered an advantage, since US education is so slow to change.

Thanks!