The rear's of your NHT3.3 speakers must be placed within 3 inches of a very sturdy wall, or the woofers won't couple correctly and this will cause the speakers to sound bright. If you have a lot of glass in the room, your probably losing bass energy thur the glass, again not helping the speaker's situation. This is the way NHT designed the speakers (to be placed against STURDY wall) call them. If you do not have a sturdy wall (lets say like a 2x6 exterior wall)to place them against, then it might be wise to sell them and move on.
For another time/align speaker, consider the VonSchweikert 4.5's. The 4.5's can be purchased here on A/Gon for around $2000 plus shipping (300lbs per pair) The 4.5's have upgraded Audio Magic internal wiring and premium Hovland caps. Albert's back in business and sadly John D. has just exited. There is also a upgrade for the VR4.5's that is supposed to take them to a much higher level. It should for $2500 a pair plus shipping. Good luck hope this helped
Dave
For another time/align speaker, consider the VonSchweikert 4.5's. The 4.5's can be purchased here on A/Gon for around $2000 plus shipping (300lbs per pair) The 4.5's have upgraded Audio Magic internal wiring and premium Hovland caps. Albert's back in business and sadly John D. has just exited. There is also a upgrade for the VR4.5's that is supposed to take them to a much higher level. It should for $2500 a pair plus shipping. Good luck hope this helped
Dave