Getting GIKed!

Rocray, For the most part, I bought my room treatments one or two at a time, and a fair amount of what I bought was range limited so as not to rob the room of air and sparkle. 
I was also a bit reluctant to dive into the REW software at first.  It looks kind of intimidating, but it really is pretty simple.  Very simple after you first get it working.  There is an REW users group associated with the software, and there are experts there who can help you get set up.   The software is free, and the only thing you need to buy is a microphone or Radio Shack SPL meter. 
Your ear should be the final arbiter on how things sound.  But understanding the room and figuring out which problems to solve is slow, laborious, and imprecise if you don't measure.   Measurement software speeds up the process of getting the room right by two orders of magnitude, maybe more.  My guess is if you try REW and invest some time in understanding  what it reveals, you will regret not having done so previously. 

Thanks for all the info brownsfan. Looks like I have some research to do. 

you are doing the smart thing by addressing your listening room acoustics...that's my absolute first thing to do. I'm lucky I have a large room with irregular dimensions and other than acoustic blinds over the front wall windows, all is sounding good.

Thanks for the response tuberist. The modest treatments I have,have definitely improved the sound. The reason it has taken me so long to finally get real treatments,is plain and simple. New speakers,or a new preamp are far sexier than some acoustical panels. 
However,the reality is,my system will sound so much better in a well treated room. Now those sexy pieces of equipment will sound as sexy as they look. I hope....

Just a little update. Last week my order from GIK arrived,and I have them installed. They really have transformed my listening pleasure. The bass has tightened up considerably. The imaging which I thought was pretty good already,has even improved. The soundstage has widened and deepened more. Although I would say the width is more pronounced.  I'm very happy with the results both sonically and visually. 
     What have I learned from this? If you haven't treated your room,chances are you are leaving better sound on the table.