I probably refresh Kotaku every five minutes. I think it has to rank at least in the top 3 of game industry websites, if only for the wealth of posts per day, usually with solid info.
I also am endeared to RockPaperShotgun.com, as like me, they are stalwart PC gamers who run a PC gaming-focused site. They have great writers who also write for other game mags/sites, so the credentials are there.