A bad recording can sound bad on cheap earphones. I think this issue of headphones being too revealing might be overblown, unless you're into a genre that is nearly always particularly poorly recorded I wouldn't worry about it. Sometimes rough audio is part of the charm with some types of music. I've seen some comments claiming that a headphone was so revealing that their favorite classical piece sounded terrible, I checked it out and that particular recording sounds rough on cheap headphones and IEMs. The hd600 series headphones all sound really nice with a wide variety of music, if you mostly listen to very bass heavy music open headphones might not be the best option.