i have heard a medium size current production monitor at Gig Harbor Audio but not the 5.3
i owned 5a for many years in a variety of acoustic spaces and with some work ( following tge hyper detailed setup instructions ) they always provided stunning sound. I upgraded to 7 mk 2 and the family sound - musical cohesiveness very deep soundstage - no fatigue that the 5a has in spades is there with lower distortion/ color
i believe the 5a represent fantastic value for the money.....and also if taken care of in an attractive veneer hold value incredibly well. I traded mine some 5 years later for just about what i paid...I bought them used
ask away !!!!!!!!!!