Look, you seem to be a reasonable person.  I'll be honest with you.  Guess I am feeling nice. Nobody here knows anything about the Gamemaster whatever they are and nobody cares.  The only headphones that I would get for under $150 would be the Etymotic ER4P if you can find them that cheap, or Sennheiser PX100ish sort of thing.  I am guessing that you will probably be disappointed with any serious recommendations you get here so you should probably just ignore this.