for sound card gaming, go for a low impedance headphone. If you connect the sound card to a receiver, integrated amp or headphone amp, it will sound that much better. (I'm sorry for the grammer).
For gaming, may I suggest something in the $100 area? This would include the K240S/55 and the DT531, closed and open respectively.
Likewise the Grado SR80 makes for a good solo gaming headphone (no LAN partying), as might some of the comfortable Sonys (CD380, CD780, etc).
Obviously I prefer cloth to leather or leatherette pads, although the cloth/velour pads will soak up sweat; but at least your ears should not heat up as with the latter.