I'm new to the audio world. I purchased a pair of turtle beach px21 for gaming a few years ago. Awful investment. They are simply terrible aside from the good microphone on them. I was also tired of my earbuds breaking so I bought a pair of klipsch image s4 earphones. They are great. But now that my turtle beach px21 have finally kicked the bucket I am interested in buying a pair of headphones for both gaming and music. My questions are: What specifications should I look for? I am absolutely clueless as to what it is that makes a good pair of headphones. I understand and that the range of frequency deals with the range of sounds the headphones can produce but that is it. Should I buy closed or open phones, and what is the diff? How will I be able to tell if a pair of headphones are able to zero in on where a sound comes from without using them? Basically what is it about headphones that would allow me to know exactly where a gun was dropped from and zero in on it? I also plan to use the headphones for music. I was told sennheiser hd 598 are great. What is your opinion on them? $300 is the most I am willing to spend. Since this is my first real pair of phones I'm buying I'd like to buy a good pair that simply perform the absolute best for the $300 price range.