Given yr (quick) preferences & spkr brands mentioned, either Proac or ATC seem indicated. I would prefer the ATC mid/upper-midrange to the Proac, and maybe the Proac's tweeter range to the ATC....
{BTW, imaging, staging etc, are good with either brand}
In the lower register, I would prefer the ATC again by a small margin -- but I'm talking about bigger models (50/100)
There are at least TWo downsides. Inefficiency, as Celtic notes, and price (high). OTOH, you might consider an ATC kit ... wilmslow audio used to sell these
{BTW, imaging, staging etc, are good with either brand}
In the lower register, I would prefer the ATC again by a small margin -- but I'm talking about bigger models (50/100)
There are at least TWo downsides. Inefficiency, as Celtic notes, and price (high). OTOH, you might consider an ATC kit ... wilmslow audio used to sell these