what kills soundstage depth?


Hi folks. Thanks in advance for your thoughts.
I am getting nice solid imaging from my current set up, but it is 2 dimensional. No depth. And I'm not sure why. my hunch is speaker placement or lack of room treatment. Any thoughts would be helpful. Also- a suggestion for a good recording for testing soundstage depth would be helpful. My taste in music is pretty lowbrow and it might just be they way stuff is recorded.
Thanks!
jimmy3993
Thanks guys. I will get a picture up of my system set up on my page.
Yall are gonna laugh... It has to double as an ht set up so I may be out of luck.
Thanks for looking. Will have picture up soon.
Post removed 
Sorry for any confusion caused, but I accidentially posted supplemental comments on your system thread with the photos.
Hi, nice setup, and yes you should have depth "if" it's on the recording. What kind of music are you listening to?

One more thing I'd try is a big quilt over the TV to see if it's contributing or not. (in addition to all your other good comments above) Speaker placement first though.

Cardas has a nice guide posted, might be useful: http://www.cardas.com/content.php?area=insights&content_id=26&pagestring=Room+Setup

Final though, is everything new? might need some breakin time...