What is the best headphones for xterra? this is my first minelab,I have a nice set of yamaha phones that sound terrible on it,i have some cheap no name brand that sound alot better,but the high tone in 3 tones sounds like it has a buzz in the background,the mid and low tones sound great.I have heard a little about 30ohm phones or something? Can someone clarify? and make recomendations.