It all depends on what news I am looking for, and I normally gather from multiple sources for each story.
As far as what MEDIUMS I use...
For local: iPhone App for local stations, Newspaper, and TV.
For national: TV, Internet.
International: TV, Internet.
But like I said, which source I draw from depends on what the topic I am looking for news on is due to knowledge on the subject, and bias differing between sources. There is no definitive "good" answer for "best" overall source.