Try finding the Superlux HD668B (b for balanced) headphones, as they're pretty nice for both gaming (specially FPS gaming, for its precise sound direction) and music (it's one of the few headsets for the price with which you can easily distinguish all the instruments present in a song -and that's a good thing-). Read yourself some reviews if you want to.
My friends and I play pretty competitively, and most of us had the Siberia V2 headset before the Superlux one. Whilst Siberia V2 costs 60€+, the price is just because of its mic, as both sound & product quality are inferior to the announced ones. Don't get me wrong though, sound quality is still pretty decent, maybe 7.5/10 and they're one of the most comfortable headsets I've ever used, but their material quality is what makes them a bad headset: they have failures, even with good care, mic and left/right earphone side mostly.
Do note that there's a difference between the V2 you mejtioned and I described, and the V2 Full-size headset, which is a bit more reliable and durable.
But, really, ponder about getting the Superlux HD668B headset, 'cause it's really worth it. Material quality is really good, as superlux is the cheap brand of one way more expensive, Beyerdynamic that is. Also, they're sold as the "basic professional studio headset", so both sound and surround quality are way more superior to the so called gaming headsets.
Most of those "gaming headsets" are a scam just to make money, and all of the people should know it by now, yet they don't somehow. Oh well.
Other thing to note about Superlux is that it has no mic. We use the mic a lot in FPS gaming, to communicate with our clan members on Teamspeak. What we did was buy a Zalman ZM-MIC1, as it's made to link it up to headsets.
Also, the hd668b is a 64 ohm headset (most of gaming headsets are merely 32 ohm...), which means you need an external soundcard to unleash their full potential. For example, the Xonar DG is a pretty decent soundcard for the price, I have bought it myself not too long ago when a friend of mine ( a sound guru) recommended me the superlux headphones.
25-35€ for the superlux, another 30€ for the soundcard and around 5€ for the mic and you'll have yourself a nice -and most important, a good- set for a total of about 70€.