It's all about dynamics? Ehh, not quite. What about colouration, frequency balance, definition, perception of width & depth ('soundstage'?), distortion, & soforth...? And speaking of dynamics - only a few CD's really are recorded true to life in that respect - & it's just as well! Just as an example, I live in an appartment - if I actually tried to get the full dynamics of, say, a symphony orchestra in my living room I'm pretty sure my neighbours wouldn't be too happy (my landlady live in the appartment just above me!). This is not to say that I refuse that dynamics IS a very important aspect of music - I've also come home from live events (both acoustically based & amplified) & felt that the stereo certainly lacked something in that area.But there are other considerations as well - personal taste, not the least in music. The usual argument from audio freaks is that 'a good loudspeaker should play any music well'. In real life, however, & considering that most of us are on some sort of budget, the choice of audio equipment becomes a matter of priorities. There are a lot of factors involved - music taste, personal preferences, room considerations etc. (not to mention WAF!). That can lead to strange conclusions - for example, in some cases people get a more economical solution by having to different sets of loudspeakers with different strengths & weaknesses rather than buying the mega $ speakers that does it all 'right'...
Just a general comment - my 2 cents.