How can Wilson Audio speakers sound that good if they are using OEM drivers?


How can Wilson Speaker sound that good if they are using OEM drivers made of last century materials? B&W used Kevlar and now Continuum, after a lot of R&D. Magico uses Graphane which is the new Carbon Fiber. 
Would a Wilson Speaker sound better if somehow one could put a B&W midrange Continuum driver instead of the OEM paper driver they use?
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Since it would be nearly impossible to know how their crossover was designed, why don't you consider one of the high grade kits available from PBN, or Madisound? You could still build your own beautiful cabinet if you are able to do that. 
Kit speakers are a better idea than full blown DIY, but they are almost impossible to sell for a decent price and the cabinet finish quality is almost always inferior. Salk Sound and Joseph Audio are basically assembled kit speakers, but done professionally and they have a good resell value.  
You can't spend your life worrying about resale value to the exclusion of other considerations like your own enjoyment and discovery.
To each their own but part of the discovery process involves selling and trading gear to get different gear. 

I have a lot of respect for the serious DIY guys and what they build as part of their hobby...but I don’t see any savings or creativity in slapping together a kit.