Have you treated your listening space?

Yes, see pictures of my room in system listing. Used Ready Acoustics panels, which I recommend.

Have not found the need to use very expensive treatments. by using area rugs and furnishings along with art work on the walls and floors seems to do the trick for me. I want good sound but realize I live with a family and can not have the room looking like a mad scientist lair.

I'll bite.
Having a dedicated music room that's fully treated has given my sound stage a true 3d image. I will state that before I put the treatments up and lazer aimed everything, the imaging and clairity was lacking.
I only thought I had a great system before.
You can't buy equipment that will come close to what treatments will do.

Ok, I have been offline for a while, because I was moving from New Jersey to Arizona. I just got my internet hooked up today, and of course the first place I wanted to go was here.
I think that I can give you an answer, at least from my point of view. I agree with Elizabeth and Glenfihi that normal furniture items and drapes can help, so that is one thing that I have always done. I do believe that the barrier for many audiophiles is confusion about which treatments of all the treatments available that they should use, and where they should place them. Of course there is professional help to be had, (like Rives) but it is very expensive for the average person.
I think that if the average audiophile knew what to do and how, he/she would be willing to spend a couple of grand to do it for improved sound. I know that I would. I would want to know for sure that it was going to work though, and that is the problem.