Hi, I was wondering what I specifically need to upgrade (and to what price point) to completely rid my turntable of 'essing' distortion about 13khz or so. My stylus has a quoted range of 20-20khz, but they don't mention that a large portion of this range sounds like [censored]! The tonearm (an offset design) is balanced and the antiskate is set properly. Do I need a stylus with a range up to 50khz? A heavier, more precise tonearm? Any specific makes/models of stylus that are recommended?