I'm trying to choose a new furnace. I'm struggling because each HVAC company tells me something different. Based on one company's recommendation, I was thinking of getting an 80% 2 stage furnace with a variable speed blower, but the other company's rep said that with my "average" ductwork, a variable speed blower would not work properly. He said that a VS blower would be noisier than a standard blower. Does he have a point? Is a VS blower a mistake with ductwork that's not perfect? Is a VS blower worth the extra cost?