Audio Research 100.2 - Very Musical, non-fatiguing, smooth, grain-free, yet transparent & nicely detailed. Lot's of very clean power. Only 2 gain stages helps produce a purity of sound that is hard to beat. Not the deepest/tightest bass, but the best SS from mid-bass through treble I have heard bar none. Can listen to it all day - draws me into the music at every volume level. Excellent match with Bent Audio NOH TVC. An absolute steal at used prices from $1400 to $1800. Done.