I can indeed confirm that the Trafomatic Head One is an excellent choice. It is beautiful and extremely versatile. It has a sub out in case you decide to add an active subwoofer. In addition, it is a great headphone amp, especially for lower impedance phones. I prefer it to the Mapletree when driving Grados. In a more recent comparison, it fared well against the Moth EC2A3, losing out only on impact, but edging it out in detail.