"Metal and EDM" - Ultrasone. Specifically the PRO900 or PRO2900 (how to decide? do you want more (900) or less (2900) bass, and do you need isolation (900) or not (2900)?). I have no idea how they'd pair with an OTL tube amp, but they'll offer the forward, aggressive, punchy presentation that'll play nicely with electronic guitars, cymbals, etc while having the bass presentation and impact to compliment EDM.