Hi, I am trying to decide between headphones: Beyerdynamic DT990 Premium or Hifiman HE4XX Planar Magnetic? I've never tried planar magnetic phones before, so--except for reviews I've read--I'm not sure what to expect. I listen to a wide range of music, but mostly rock and experimental. Stereo equipment: Rega Brio integrated amplifier Rega Apollo CD player MoFi StudioDeck turntable LSA2 Statement Tower speakers Headphones: Bang & Olufsen Play H7 Beyerdynamic DT 770 PRO-80 ohm (Massdrop) Mitchell & Johnson GL2 Sennheiser HD380 PRO Sennheiser HD6XX (Massdrop) Any comments about preference between Beyerdynamic DT990 Premium or Hifiman HE4XX Planar Magnetic would be much appreciated. Thank you.