Heya,
Load up your gaming sound files and look a their sampling rates.
Then think about whether or not you're willing to drop about a grand on that bit rate and quality of recording. If you are, then by all means, get any Ortho that you can afford. Remember, the the Fostex T50's are not that great of headphones to begin with. Someone may argue that. But frankly, they're just not. It has nothing to do with being a dynamic or an ortho, it has to do with simply having good sound quality. If you want an ortho just to say you have one, or tried one, without the higher end costs, by all means, try it. At like $75 new, by all means, go for it.
Very best,