I think my anti-Pac 10 football biases may be bleeding over into basketball, and there are certainly some good teams in the Pac 10 this year. But really, only UCLA seems like a team we wouldn't beat more times than not.
There haven't been a whole lot of good non-conference wins by the non-UCLA teams (there are wins against Wichita State, Georgetown, Memphis and Gonzaga, but not much else), and I just haven't understood why they have all been ranked higher than the top 5 ACC teams all year.
They all play each other, including UCLA, tough, though, so I guess we'll see in the tourney.