Benchmark Preamps and Amp - For real?

I have listened to the AHB2, in mono configuration and they were spectacular. Serious drive, clarity, and dynamic headroom. They were driving a pair of Watt-Puppies, then a pair of Alexandrias. The A's bottomed them out, but the sonic result was good just the same/

Actually, at $6K for the pair I would hope they sound seriously good.

Jetter, At that money these amps are a huge bargain. You won't get anything better until Parasound releases a new JC1 and that will go for over 10K/pr

I was looking at a ABH2. Instead I think I'm going to try Class D PS Audio Stellar M700 monos. 

I listened to the HPA4 at Axpona this year while auditioning headphones.  I now have an HPA4 in my home system, as it paired astonishingly well with the Audeze headphones.  It is dead quiet and just gets out of the way.  Great bass extension and clarity.  I got it to be my headphone amp, but it also ended up taking the place of my tube preamp (in front of 300b monoblocks).  The tube pre has a little more bloom and spatial sound to it, but you really have to pay attention to notice.  What was more apparent to me was the absence of a subtle distortion in the tube preamp that I did not know was there until the HPA4 did not manifest that same distortion. 
Get it with the remote control - it is absolutely worth the extra $100 at that point.