How is sound stage compared to the other generally recommended lower priced IEMs (Sony MH1c, JVC fx40, Monoprice 8320, etc.)? Any issue with fakes for these (probably not given the price)...

I currently use a pair of Creative EP-630, I'm wondering how they compare to the Koss kcs75s. For instance I've been reading that the kcs75s don't have a large sound stage, which makes them bad for gaming. But is that in comparison to much higher end headsets or? I basically use earphones...