I used to work as a tech in a recording studio (along with a theatre and TV studio) We have a set of nearfield speakers, and that was about it.
However audio reviews are basically:
"Its got punchy bass" and "sounds a bit woolly" or "has brilliant clarity in the upper regions" are about as descriptive as review get.
Not only that but "high end" audio is replete with proper charlatanism. Without trying the devices, its impossible to assess how good they are.
personally, I have a second hand denon HDMI decoder thing, with airplay. I have some cheap surround speakers. The thing that separates it from "high end" amplifiers is that it has a microphone to add some basic DSP filtering during a calibration stage. It gives a decent flat reproduction of what's coming into the amp (ie its not mid or treble heavy), and cost about £250 all in (the amp was second hand)