I had a full Benchmark stack, DAC3B, LA4, AHB2 and could never get really engaged with the sound quality vs other components, Pass Labs, ARC, HoloAudio. I ended up selling the DAC3B but still have the LA4 and AHB2. The LA4 is a very nice sounding preamp and my favorite component out of that stack. The AHB2 sounds decent, on the warm side in my setup but when compared to a Pass X350.8, the Pass is a noticeable improvement top to bottom. Build quality is very nice on the Benchmark stuff and I think they are very good values but I’m not convinced of all the hype.
In my situation I have the LA4 and AHB2 (soon mono) and I pair that with a more engaging DAC, the Musetec 005.
I use my DAC3B with a RAAL VM-1a tube headphone amp that benefits from the very neutral to slightly bright DAC3B.