I had a Benchmark DAC back in 2007. I found Benchmark to be extremely clean and clear, but a bit sterile. Voices in real life never sounded as "clinical" as they did thru the Benchmark. So, the OP's concerns might be justified. I admired it, but it wouldn't be something I'd choose for listening to music, either.
Class A\B or D for summer months (vs Class A)
I have a Pass XA25 with a XP20 pre-amp with Forte iV speakers.I bounce back & forth between streaming local content & vinyl. Noise floor is low, sound quality is good through the volume range - Classic rock, hard rock, blues rock... Typical late 70's through 90's mainstream bangers.
Last summer I did notice the XA25 amp and my central air were battling it out a little in the listening room. The amp had no issues and runs warm regardless of season. I guess I notice it more when I'm looking to stay cool vs stay warm.
I have a Benchmark LA4 preamp that I used prior to the Pass XP20. I'm sure there's good synergy between the Benchmark LA4 and Benchmark AHB2 amp so the AHB2 has been on my 'investigate further' list.
I'm a little worried that it might be too thin or sterile vs the XP25. The AHB2 would certainly help reduce the heat.
Anyone been down a similar path with thoughts to share?