Bill Moyers on PBS is really the only one with any credibility but doesn't cover the issues on a nightly basis as the others do. He's out of the old-school Cronkite/Murrow mold of serious journalists.
Although I watch some or mostly all of Olberman, Matthews and Maddow almost every night, I find sometimes I just can't take the manic ranting for very long - however they do pick up on some important points that the others seem to miss.
I think they need to downgrade to decaf or something - it would make it a little more bearable...
