My H20 S250 replaced my tubed ARC VT100MKII in May 2005 and I am still most happy with it. When I first auditioned it I found that it was the first non-tubed amplifier that I could listen to without bleaching out the harmonics. Since I bought it I've had Henry upgrade it with the newest ICE modules and V-Cap bypass caps. As Rpw states, it is most sensitive to power cords and ICs. Its definitely worth an audition in your system. Henry Ho will send you one for a test drive.