Hmm, I really enjoy Non-Prophets, too, just in a different way. They're both very entertaining, at times, just for different reasons.
The Atheist Experience is more slapstick, with the theist callers, and the learning component of that is learning the specific, logical objections to pretty much every theistic argument. It's a good crash course, before you go out to debate theists, yourself.
Non-prophets is better from a general, news perspective, on things that are important to us, that are going on around the world.