Originally posted by Marc Sabatella Depends on the concert. But FWIW, the difference any of these cameras at ISO 1600 is not all that great. Pictures will be noiser than ISO 200, sure, but no one expects otherwise of concett pictures. I shot for years using a camera with the same sensor as the D40, and my wife still does, and we both shoot at a professional level and get professional quality results. It's more about technique - inckuding PP technique - than it is about cameras. Well, lenses help :-)
Could be different in the US regarding cameras and concerts. Pocket P&S cams wouldn't be a problem here but everyone can see when a serious shooter ambles in with a camera bag and then procedes to take it out, mount a lens , mount a flash.
Actually here you'd be searched first - you woudlnt get in with that sort of kit
AS for PP work, yes its important too. I shoot with a nasty 600m Astroscope that has no ED glass, and getting serious into PP work is something i had to learn