what speakers demand high end electronics

I agree with Mordante. IME, the more revealing the speaker, the higher quality other components in the system need to be for the speaker to sound its best. A less revealing speaker will in effect act as a filter, concealing to some extent the flaws and limitations of upstream components.

I believe that this observation about speakers can be generalized...

Matching a higher resolution upstream component with a lower resolution downstream component will typically yield better results than matching a lower resolution upstream component with a higher resolution downstream component.

Bryon

All good speakers!!

Doesn't it really boil down to "It's All In the Ears of the Beholder". ?

Apogee, Thiel?

This is a complicated question. I would never choose speakers that sounded really well with only very expensive electronics unless I had unlimited funds. On the other hand, I would not expect much from any speakers driven by $1k amp and weak source.
It certainly makes sense to me to drive $5k speakers with $10k amp to get the best out of them, if I really like those speakers.
What wouldn't make sense to me is putting $5k cartridge on $5k turntable and playing it through $2k phono stage.