VGCHartz, obviously, then IGN and Kotaku.
I used to frequent GameSpot, until I was banned for the stupidest of reasons. GS has some of the worst mods ever, and the worst thing about it is that once you are perma-banned, it's impossible to argue your case. If they happen to select a bad mod, then everything goes to hell. He bans left and right, and the higher-ups never find out about it because the guys that are banned are immediately silenced.