I confess, i have not listened to proac 3's. But i have listened to 3.5s and d38, d100s. I currently own pairs of 3.8s and d15s for the bedroom. Although i would say that it is not entirely urgent to upgrade the 3s, they are stellar speakers, if you had to go for something under, even significantly under $3000, i would go for the studio 100 v3. I have listened to these with modest sources and believe they are stellar loudspeakers. They dont beat my 3.8s but do come close. Thats my opinion and others are open to theirs, but read the reviews and take a listen at a good hifi shop. They are winners, in every catagory.