I think there is something important to be said for having perspective... in that way you can really judge the value of, or the quality of, what it is you are involved in.
How do we get perspective? by trial and error, by experiencing difference, by building up "seat time".
I think a person that comes in and buys a vintage pair of 901's might say to themselves, "my god those are the best sounding speakers I have ever heard"... then give them a listen of some heritage and they gain some perspective irrespectful of the whether or not they personally like the heritage sound.
The old adage, Travel broadens the mind applies here.
I think when I first started this thread, my main concern was... when can we judge when enough is enough in terms of acquisitions and modifications when really, for me personally, the hobby is not about buying, finding deals or synergistic compromise and interplay of components but one of "Listening" to music.