great thread... for me, this is a 3 way tie.. even though I have never owned a truly elite system, there are still some great memories..
1) many years ago I was playing a classical piano recording using my B&W DM7's with some very nice cartridge and my friend Joe thought my brother was playing piano in the next room.
2) my 33 year old son now considers 70's vintage Genesis, Yes, ELP. etc.. his music.
3) My current girlfriend, who is Chinese (I live in Dongguan..she calls the stereo room my "song room") said to me something to the effect "nie booyanda" (translates like "you are different") while she was watching me using nylon wire-ties to fix a panel of acoustic foam while mounting it to a frame from one of those temporary clothing closets/storage racks to use as a rear diffusion panel behind the speakers..