"While it is true that people do go overboard with treatments, proper treatment of your listening space will make a bigger difference in your system than almost anything else."

Anything else refers to what? I can't think of a better place to put room treatment than dead last on my list of priorities for better sound, oh wait maybe the color of paint is last... If your equipment is junk it will sound that way no matter how much you spruce the room up. That's like covering a turd with some chocolate, oh it might look like a candy bar, but once you get past the sweet outside it still tastes like poop.