ATC has very revealing Midrange but I think they lack in Bass overall across their speaker range due to how they load the drivers up.
If you are requiring something thats Fatigue Free but has the transparency of Studio but with a more musical presentation (Warm Emotional) I would Highly Recommend the Quested Active Speaker Line with a tube Pre-amplifier. The Bass is tuneful and just right, the highs are smooth and the midrange is almost as revealing as the ATC but tends to be warmer and smoother and more forgiving on lesser recordings, which overall works better especially with Digital Recordings.
If you are requiring something thats Fatigue Free but has the transparency of Studio but with a more musical presentation (Warm Emotional) I would Highly Recommend the Quested Active Speaker Line with a tube Pre-amplifier. The Bass is tuneful and just right, the highs are smooth and the midrange is almost as revealing as the ATC but tends to be warmer and smoother and more forgiving on lesser recordings, which overall works better especially with Digital Recordings.