Having owned the Sutherland 20/20 and the Duo I can say from experience that Ron Sutherland is a phono stage genius. From the Vibe to the Loco every step in his line is superb and a bargain as well.
I love my Aesthetix Rhea Signature with its ten tubes but will soon be playing around with a Little Loco mk2 and a rewound low impedance Benz Ruby Z to introduce myself to the world of transimpedance phonography. Like
@Mather I find that tubes can be a source of dyspepsia. Sutherland products can be a set and forget it source of great pleasure.