Tell ya what
If you are willing to give up some fq's in bass + highs response, you will be rewarded with midrange magic in a SET.
So its hard to say one is better than the other. But I'd say SET is my preference. PP asa 2nd setup.
Speakers, only a FR system will do.
I look at xover/low sensitivity speakers as midfi. Including Zu and Tekton, both mid-fi.
To qualify for hifi speakers there must be near zero cloration/distortion.
At say 70-75 db SPL.
I listen to music at no more than 65 db SPL.