I own a set of ATC SCM-20A active monitors. They replaced Dunlavy SCIVa’s powered by one of a variety of amps and speaker cable combinations. I never turned back. Simpler is better. No longer do I need or worry about the adequacy of speaker cabling or amps.
Your ATC choice is a good one; I believe your will likely enjoy improved sound reproduction. But I agree with @whart, listen to your candidate speakers, preferably in your home audio listening room before deciding.
Your ATC choice is a good one; I believe your will likely enjoy improved sound reproduction. But I agree with @whart, listen to your candidate speakers, preferably in your home audio listening room before deciding.