loads of studio monitors use
horn wave guides of differing design.
even budget nearfields and mid fields.
plenty of them are used in the uk to.
atc speakers are great but not the best.
atc speakers are excellent value but not the best.
some jbl speakers are great too ( not so many good ones since they were acquired by harman int. )
dave berriman designs some speakers that are not a million miles away from an atc design by the way. so he may not be the best judge in terms of a neutral write up although i am certainly not casting aspersions on his honesty.
regards.