alexs2,
I totally agree. In the quest for ultimate perfection in musical reproduction one has to pause for breath and draw the line somewhere.
Even "live" music which recordings ( by that i mean a musical recording in whatever form) try to aspire to will be affected by the acousitcs of the venue ( and occasionally how much alcoholic berverage one has consumed!

)
Even with unlimited funds, there reaches a point where the benefits of spending more on a reproduction system become blurred and even ego massaging. This is more so because as you rightly pointed out , after a certain level , indiviual musical tastes and perception of what sounds "right" become a deciding factor.
Everyday anecdotal examples abound: people buy a car worth £2000. and then proceed to kit its audio wiith a £5000 system in order to get The Royal Albert Hall squeezed somewhere within the car!!
Each to his own...Besides, this years hottest kit will be old news by next year .. what then?
But it is also true that development would stifle if there is no greater standard to aspire to. There is nothing wrong with being an audiophile as long as snobbery is not in the mix, that is tiresome. "I love my reference recordings: they sound better than yours

"
My high school ( East Lansing, Michigan) motto is
" Where greatness is possible excellence is not enough". ( im still trying to grasp at excellence many years on

)
Over to Stax, Senn, Beyerdynamic, Grado. AKG, Koss ,Shure...... Keep making great phones!