Finding dual pane windows on a used motorhome

I've had both single and dual pane windows in 7 motorhomes that I have owned over the years and I really don't see the difference, especially with noise, if your neighbors are talking late at night and your head is inside a slide out 10 feet from your neighbor, you're going to hear them either way, the roof vents, cab windows, etc. all allow noise to come in. We have stayed in Florida for months at a time and again saw no difference with heat, good suncreens in my opinion are more important than the type of window. I'll take either one but would not rule out a nice unit because of single pane windows, you also don't have to worry about singles loosing their seals and needing replacments.

Nick