What is the most unbiased news network?

i want to know, which is the most truthful, undoctored network? i know that fox leans right, but basically all of the other stations lean left. i think that CNN is probably the best because of Anderson Cooper and thinks like that, and they do not have giant talking heads that will not stray from opinions like Bill O'reilly. are there any knocks on CNN? i have googled this and seen some pages and other yahoo answers questions but most of them are opinionated people that say FOX is only criticized because they are the only station to lean to the right while every other is liberal. i didnt see one thing that gave props to CNN. i dont want to hear why FOX is criticized, i want to hear which network is best and why. thanks in advance