I've tried the Sennheiser 560's, 600's, 650's, 660's. Also tried Shure 1840's, AKG K702's, Hifiman Sundara's, KLH Ultimate One's, Fidelio X3, Avantone Pro's, Audio-Technica R70x's, and I thought the 598's sounded better than all of them. What could it be? Angled drivers? What else could make...