My favorite small integrated amp is the Audiosector "integrated amplifier". Check them out at audiosector dot com. These are as close as I've heard to single-ended triode from solid state. The sound (with suitably efficient speakers) is certainly dynamic with punchy and well controlled bass. Detail is excellent and imaging is precise if not quite as spacious as some other tubed amps I've had. However, what sets this amp apart from most others is its transparency. Most other amps sound opaque in comparison. I had a Wyred ST 500 briefly and, if power weren't an issue, I'd take the Audiosector every time.