All depends on what sound you are looking for. The room treatment cannot change the tone or clarity or slam, or the separation as well as upgrading the parts in your components. You have to know what makes something sound the way it does. Think of old Counterpoint equipment for example. Sounded pretty good back in the day but the parts today are so much better that what was used in them. Upgrading the parts and a few other things takes you to a level you probably cannot buy today. IMO to many people are chasing something in sound that they can already have with upgrading the parts quality and a few other items. How do I know this, we have been repairing and upgrading audio components for over 20 years. We have heard and compared more components than most people have heard. It comes down to knowing what makes the sound you want.
Our listening room in Northern New Jersey is open for all to come listening and enjoy.
Happy Listening.