The AHB2 amp sounds pretty good in my bedroom with Harbeth 7ES3XD speakers but I would not say it is the best product that they make.
I also have in same room the dac3 and benchmark hpa4 linestage and headphone amp. The headphone amplifier and dac using balanced cabling are an excellent combination with my slightly warmish headphone ZMF closed ended Verite.
As for the same dac and linestage with the amp I found it was very good overall but did not draw me into the music as does the same combo with an EAR 890 tube amp.
Ultimately its a subjective exercise depending on your room, associated equipment, and cabling. Its certainly worth an audition imho but for most unlikely to be an amp you passionately love (but for value hard to beat).