Don't waste Citra at 60. I wouldn't put it in anything before 20 minutes from flameout. It's best in whirlpool. Besides, it can leave some nasty harshness at 60 minutes. For bittering think smooth flavor, high AA and versatility. Most batches of IPA or Pale Ale only need a small amount of bittering because of the amount of late hopping. For Lagers, Blondes, Bitters, etc you don't need a lot of IBUs total so the amount is pretty small there, too.
Like Ozark, I like Magnum for most stuff though I use Warrior for IPAs or Pales to get a little touch of piney character in with the bittering. There are dozens of other varieties that are perfect for bittering and blend well with just about any other hops.