Dark Grey convuluted foam

I am no expert but have gone through quite a few trial and errors. It depends on what you're looking for and every room is diferent. If you feel the highs are piercing or the sound becomes 'messy' when you crank up the volume too high then you would need absorption on at least one wall. I personally ended up with absorption at two side walls and RPG diffusors at the rear. I cannot treat the front wall as I have a screen there but have tried diffusors with positive results.

If you do not plan to have treatments on the side wall then I would think you can have absorption at the back and possibly minimal absorption at the front behind the speakers. You need to try it out yourself.

On a separate matter, I find bass traps to have a positive effect in my room as well although some may not find them doing any good in controlling the bass.

You can be amazed at how well your system will perform or react in a well-treated room. Prior to treating my room I always cannot turn up the volume too high although I like my music loud or I would end up with painful ears. Now I often listen at higher volume levels without hurting my ears. It just feels great when you can just keep turning up the volume without getting a 'messed-up' sound. At that point of time you would appreciate the importance of room acoustics and maybe spend more time working on improving it.

Ryder, Thanks for the response.
I do not have a problem with high frequency at all.
I was thinking of soundstage depth.
With my Big Sony in between the speakers, I am sure that limits my options.
Covering the TV while listening to music is ok, but, I also watch Sports while listening to music.

I am using ASC 16" Round Bass Traps in the Corners and on the side walls I have ASC products on the first and second reflection points.
Behind my Sony LCD is a half moon ASC trap and above it is an Echo Buster on the wall.

I was seriously thinking of treating the entire wall behind the speakers to create a dead zone .
I have read that that is desirous along with the area behind the listener as a active zone.
So, behind me is my thousands of CD's on racks providing reflection surfaces.

Chadnliz, yes thanks. It looks like it only comes in the color natural(whatever that is)

I moved my system into a new room that has two chairs and the stereo now. It was extremely lively with almost no soundstage, depth or focus. After installing most of the foam the improvement is not subtle. The music is no longer seeming to come out of the speakers. I can play it much louder without being driven from the room. I'll go on record as saying this stuff is good for the money.
The previous room was treated mostly with DIY absorptive panels and heavy carpets on the walls. They worked pretty well also. Other than the aesthetics, the room looks like a sound room, the Auralex products work as advertised.