The Benchmark AHB2 certainly has impressive measurements that have been confirmed in reviews; and quite a few satisfied owners when paired with the right speaker.
It's a great time to be an audiophile. There are quite a few very good new amps available in the expensive but still attainable price range for people of average income. Of course, yesterdays really good amps can be bought at a discount on the used market, but that can be overwhelming, time consuming, and frustrating (all three of those things in a few different ways); but now I know where to start if I need to.
I've ordered PS Audio amps from Ivan. I went with a pair of the M700 mono-blocks instead of the S300 stereo. I'll post my impressions in the PS Audio section as my schedule permits. The amps will need time to settle in anyway.
Thank you very much to all those who responded here. If I find that the PS Audio gear doesn't suit me, I'll still have these recommended amps I can try out.