Room is way too bright.

I can vouch for that Magnepan comment. I have some Magnepan Minis in a 10 x 13 x 8 open room. I have a CD rack near the left speaker and a huge TV placed on the floor of the right speaker. If I used non-Magnepan speakers in this space it would be crazy reflective and fatiguing. The Mini sound very good in this compromised space and the only speaker that I have owned that I do not worry so much about the first reflections.

Window tinting is effective in bright rooms.

My primary listenings system is in a room that also has a projection TV.  I solved both issues in regard to the one wall that is floor to ceiling windows by having some acoustic curtains made up that both make the room dark for viewing and damp reflections for listening.

Dipoles. Or do what I did but your room is going to be very very dark. 

Without knowing the layout of your room there have been a lot of good suggestions.  Depending on the number of windows, covering them properly can get expensive.  If you have hardwood or some other hard surface for the floor, get a large rug in front of the speakers.  Also treat the first reflection points if they can be attached to a wall.  There are also portable absorption treatments on stands if a window is at the reflection point.