Thanks boomana,
I am not interested in any of those (studio, engineering) maybe critical listening was not the best words to use, and yes "golden ears" certainly a loaded term, is this http://www.moultonlabs.com/full/product01 (have no association with them). I guess I am just trying to better understand what to pay attention to and to be able to discern differences and enjoy the music more and trying to learn how to do that. Thanks grawk I will check those out.