"I would heed Atmasphere's advice."
What advice? To buy his amplifiers?
"they like to played at medium-high levels to sound fully fleshed out and to not sound very dynamically polite."
You just described all speakers to some degree. However, it depends a lot on how you tune your system.
Quads are good at low level listening, but if you ever want to play them loud it is likely they will be damaged and very expensive to repair.
What advice? To buy his amplifiers?
"they like to played at medium-high levels to sound fully fleshed out and to not sound very dynamically polite."
You just described all speakers to some degree. However, it depends a lot on how you tune your system.
Quads are good at low level listening, but if you ever want to play them loud it is likely they will be damaged and very expensive to repair.