David Brooks is someone I had only barely heard of before he became a regular columnist with the NY Times. He's quickly becoming one of my favorites because (a) he always strikes me as level-headed and sensible, not prone to shrill extremism and (b) he's conservative. When he supports a position I don't (as with gay marriage) he can often leave me questioning my views, which to my mind is the best thing that can be said about a columnist.
Today, he knocks down the "neocon cabal" nonsense, but he also tackles a bigger issue, which is the extent to which proliferation of media outlets is allowing people to "choose their own reality". That he can see the idiocy of this for both the left and the right is what I mean when I say he's level-headed.