Gaming headphones/headsets

Hi everyone, I am a big Mac gamer and I love to use headphones when I play. Unfortionatly, my Logitech headphones are not working as they used too. The sound shifts from one side of the headphone to the other and the right side makes this weird sound sometimes. I have done some reasearch and there are so many headphones/headsets to chose from and they all have different specs. So I was wondering, what headphones are good to buy for gaming? What headphones do you use?

Thanks