If you want to focus on the vocals, 6XX for sure. I had the 58X for a while but could never get away from my 650s although the 58X had a more "musical" presentation to me instead of the laid back 650 sound. With that, though, I felt the vocals were more grainy and less defined, but you really can't go wrong with either. Both are serviceable gaming cans, but it may depend some on the game. I rarely use Senns for gaming unless it's an RTS or something where I have background music or want to chill with tubes. PS4 gets the DT1990s or Argons. 58X are also more efficient for your Fulla, so you'd get more out of them with that source. Edit: you might give one of the Phillips cans a look for the price as well.