Stax are the best for gaming overall. Nothing can touch their speed and clarity. The depth of the soundstage on a Lambda series headspeaker is just insane. It is like having a sniper scope for your ears. Seriously. I have won in Cal, Twl, etc. It helps to have these. Might be out of your price range if you need more than just the energizer and cans.
Otherwise, Beyer 880. 600 ohm if you can swing an amp. 250 ohm if not? Dunno about soundcards and the 880. It is the best overall dynamic headphone I have used under $300.