I think there are countless ways for audiophiles to both wander into, and out of, the many pitfalls involved with the subject of room treatment, but I would agree with others here that it's very easy to overdo it and you usually have to find some suitable, and mostly subjective, method for finding your way through it, assuming treatment is needed at all. If you're intent on going a strictly objective route to be sure, then I'd say consulting a pro may be the best way to go.
In a lot of these threads people say without the room being treated
It's a waste of money to upgrade you're system. The problem is I don't think most people know how to treat their rooms. I really think it takes a professional to know how to treat a room. Sure you can play around with it if you like but it could also be a big waste of time and money. And I know hiring a person to acoustically treat a room can't be cheap. I wonder why more people don't discuss this subject and make recommendations on who does this kind of work. When I look at the big picture this makes the most sense.