Our 2003 Southwind has a lot of wind noise when driving around 65 mph. It sounds like it is coming from over the windshield area, rather than the side windows. We had a 2001 Southwind that was extreme...
Our Hurricane had a loud air noise at the top of the windshield. The dealer taped up the top of the windshield and the noise stopped. Then they removed the windshield and installed it with a new seal. That took care of the problem.