Farjamed,
You gotten many good responds in regards to speakers, so I won't add any more to the list. But what I would recommend since on one side of your speakers you have a glass wall is that you get some lined curtains. The glass will play "hell" with your sonics unless you have some way to tame them. Heavy lined curtains can work very well. As far as your entertainment center, try to pull your speakers as far forward of the entertainment center as you can as it will improve your soundstaging. Actually you might what to audition some speakers that are a bit forward in nature to get a decent depth in your soundstage, since the entertainment center will probably inhibit any soundstaging behind the speakers. BTW, I live in a condo, and have an entertainment center between my speakers, so I do know of some issues that you face.
You gotten many good responds in regards to speakers, so I won't add any more to the list. But what I would recommend since on one side of your speakers you have a glass wall is that you get some lined curtains. The glass will play "hell" with your sonics unless you have some way to tame them. Heavy lined curtains can work very well. As far as your entertainment center, try to pull your speakers as far forward of the entertainment center as you can as it will improve your soundstaging. Actually you might what to audition some speakers that are a bit forward in nature to get a decent depth in your soundstage, since the entertainment center will probably inhibit any soundstaging behind the speakers. BTW, I live in a condo, and have an entertainment center between my speakers, so I do know of some issues that you face.