I definitely respect the question, but tend to think "every reality is somebody else's bubble." :D

That said, there are streams included from outside the U.S. (Al Jazeera English, Sky News, two pretty different perspectives :D), and a bunch of American networks and different properties.

I also tend to focus more on production style and genre than "bias." (For example, I like loooong interviews over short ones, and find that matters to me more than bias of the entity.)

Another example in the spreadsheet: Bloomberg is a finance network, which means regardless of political persuasion, they're going to be less "showy" in their production style. Fox is definitely theatrical, regardless of political persuasion, and are going be very dramatic.

As for me, I'll mostly be reading Twitter Lists, and will have ABC's stream open, only because they will feature 538 (A U.S. data journalism site) contributors throughout the night.