IMO room treatment is the most important aspect of having great sound. The most money for the buck upgrade . I use asc tube traps . Awesome customer care and they work with you like a architect does when you are designing your room.
they sent you equipment to measure how ur room sounds from where u listen to music and review with you in real time and recommend changes. Amazing group of people. Shout out to Jordan . Prolly home made stuff are as good but I am sure there are quite a few of us who don’t want to do that .
asc or similar brand all the way . Sound treatment is no 1 for getting good sound from your room. A music professor who is a piano player in the Cleveland orchestra came to my room and played the piano and was lost for words how good the room sounded . (My listening room is big and has a grand piano in it .) He was so excited that he wanted to have a live trio band play in my room and record it . Vote for investing in sound treatment , done right .