The whole point of measurement data is to avoid this 'slow' process. A speaker that (1) measures ~flat throughout the FR, (2) is big enough to fill the required space and (3) can handle the associated power can genuinely be bought sight unseen. These are the kinds of speakers that are difficult to distinguish in ABX tests, because they sound 'correct,' meaning they play the recorded music as intended.Choosing the right HiFi speakers is a slow and steady process.
Those of us who live in the boonies (no nearby dealers) have ~always had to buy speakers unheard/unseen anyway. Thank ASR/measurement data that we now have objective data that can help in this regard.
When I needed to replace speakers ~24 years ago I discovered the audio magazines. The speaker evaluations just seemed to be opinions based on music I never listened to. The BS led me to take a chance on powerful, active studio monitors instead, which I then used for 20 years.
When I recently replaced those, the measurements led me to Revel F208s with a class D amp. The combo sounds wonderful, and can handle any type of music I throw at them.
Didn't those JBL 590s you own stop your speaker search? Why? They meet the 3 criteria above.