I was planning on eventually trying alternatives to the Iridium. I had aspirations of getting a high-end audiophile headphone amplifier. I was dreaming of Italian headphones... But, this combination of Iridium > Darkvoice > headphones (currently Sennheiser HD650) is astonishing. The Strymon does a great job and the tube HP amp is the finishing touch, giving the sound tube qualities. Now, to capture what I amhearing...any suggestions? Have you seen z reviews setup?