Have you tried The Week?
It's a British-based magazine, but I'm mostly familiar with the American print magazine they provide. It has an online version available here http://theweek.com/ which provides some very informative pieces on political issues, but I would more strongly recommend their print stuff.
Essentially, what they do is provide summaries of what each major news source says on a given issue. So for example, if the topic was "Economic Inequality," they would have brief excerpts from USA Today, MSNBC, Time, Newsweek, Fox, the Huffington Post, etc. on what those news outlets all reported regarding this topic. That way, you not only hear the viewpoints and opinions of everyone on the political spectrum, but you can weigh their arguments and the evidence they provide as well. They even do similar pieces on the news of foreign countries, with all of the major news sources of that nation summarized for that week as well.
I find that it is an excellent sources of information, since it literally gives you every political view, albeit in a shortened form. If you want to make sure that you hear both sides of any given issue in order to make an informed choice for yourself, it is a magazine that is dedicated largely to showing every argument in a given debate, not in promoting one opinion. It definitely keeps me a lot more informed than I might be otherwise, and I strongly recommend it.