The Best you can do for yourself is not waste money on any gaming headset. Most if not all are trash, your paying for a brand instead of quality.
But I am not without solution!
Get a Pair of headphones. Mine are the Superlux HD668B Dynamic Semi-Open Headphones they cost $42.
This will get you audiophile quality sound (though entry level) so not only will gaming be awesome but movies and music too!!!!
Next Get a Mic. Mine is the AntLion Audio ModMic 4.0 Attachable Boom Microphone - Omni-Directional with Mute Switch it costs $49
This is High Quality Mic with only one job...being a good mic. Many gaming headsets fail here with shoddy sounding Mics!!
That is 91 dollars. but you get far superior quality for your money you can also refer to Gaming Headsets Suck - Make Your Own For $50 or Less. This video gave me the idea and helped me make an informed purchase.