As far as quality of news, I'd echo the sentiment others have given that Wall Street Journal's factual reporting is stellar, but their opinion and editorial pieces leave a lot to be desired. I'd say the same about The Washington Post and Los Angeles Times.
The Atlantic is decent for thoughtful editorials as can be The New Yorker, but honestly, you're just going to run into some sensationalism and knee-jerk, politically-motivated slant no matter what editorial/opinion sources you choose, so caveat emptor.