I compared their sound quality to a pair of brand new B&W 704 ($2800) and the used Ref3a were far less fatiguing.
A friend who's an audiophile says don't bother with older speakers as the technology has improved dramatically to make most moderns speakers much better sounding at the same price point.
Are people in agreement with this statement: that newer is better than older speakers?
I paraphrased your statement above.....
Make sure whatever you end up with is
not-at-all fatiguing....not just less fatiguing. If the Ref3a
were fatiguing, you're still barking up the wrong tree.
It's altogether possible that it wasn't the speaker causing listening fatigue - some other area in the chain (often likely, the digital source)
As for the subject of old vs. new...
neither of the speakers mentioned are state-of-the-art in any era (tho, certainly, adequate choices on the whole)....choose whatever sounds pleasing irregardless of age, but with an eye on your budgetary constraints.
The advances in speaker designs the past decade seem to be evolutionary, rather than revolutionary, by my yardstick as such, so I wouldn't be pigeonholed in that debate. Just focus on what you like and can afford, and tune out the audio-phool chatter on the subject and you'll be fine.
Your hobby exists to please you, not the masses - so, just enjoy

Your tastes, or 'refinement', may change along the way - you can't really help that. Enjoy what you can today as it's the only reality you have to judge right now
