Googling this didn’t really help me decide, but after stumbling on an interview by O’Relly with Guido van Rossum, the creator of Python, I decided to go with Python 3.x.
Here’s what he said that set my mind:
If you’re learning Python for the first time, 3.0 is a great way to learn the language. There’s a couple of things that trip over beginners have been removed.
It’s easier to learn the differences between 2.6 and 3.0 after you’ve learned 3.0 than to go the other way.
Happy learning and programming!