I would like to know how some become so knowledgable on high end audio.
Easy answer:
1. Trial and Error. (We've bought, (and sold!), a fair amount of equipment, (and so have our circle of friends), so that between all of us, we've learned what works, and what doesn't, by listening to an "inordinate" amount of equipment over the years!)
FYI:
Definitions of inordinate (adj)
in·or·di·nate [ in áwrd'nət ]
1.excessive: beyond reasonable limits in amount or degree
2.unrestrained: showing a lack of restraint or control
Synonyms: excessive, undue, unwarranted, immoderate, extravagant, unreasonable, disproportionate, unconscionable, exorbitant
At least that's my answer, and I'm sticking to it!
;-)