I just took delivery of an AHB2 today. Dac3b + hpa4 +ahb2 + roon + rew = I think i am done with purchasing audio gear for a long long time.. I was worried the overall sound of the benchmark stack would be too cold/clinical/analytical/bright.. I was wrong. It's just clean, fast, accurate, and I am loving the detail. It actually sounds a tad warmer than when I had an Audiolab 6000a running in power amp mode. There is also more meat in the mids. The hpa4 is just a killer headphone and line amp. Plus it has a remote!