Is it important to get dual pane windows?

I think there would be benifits aside from a minor cost savings on energy, If you were in a cold climate with single pane you get cold spots or radient cold, even minor drafts, the furnace runs alot, with dual it will run less, so with the AC and the furnace running less, there is less constant noise

I would like to see 5 inches of sprayfoam in the ceilings and walls makde with a 2 inch cavity and sprayfoam, and 2 inches in the floor with thermopane windows,,,, that would be R30 in the ceiling and R12 in the walls and floor,,, A nice warm,, or ,, cool unit for sure then