I was over at FM in an ISO conversation. So I'm curious to what the 5D2 users comfortable maximum ISO is. I'm comfortable at 1600. I would like to shoot at 3200 but I find if you underexpose a bit the skin tones start to show it. Same can be said for 1600 but the higher I go the less forgiving it is. I know that one needs to expose correctly but in a run and gun situation yo don't always get a second shot.