Just for a different solution. One I've been putting off, but now kick myself for taking so long... custom ear plugs with speakers fitted inside. Had a mold made of my weird ears, chose the color clear for the plugs (would have to look to see them) and they arrived a week later.
Eureka! No more fiddling with getting plugs or ear phones/plugs to fit, with wind noise still somewhat present, having them come loose during a ride, or having them unseated when putting on the helmet. Plugs pop in an out, perfectly fitted to your ears. Can still hear voices and the sweet bike. Kinda pricey... $100 for plugs only, $200 for plugs with speakers (Outstanding... don't have to have the iPod/MP3 volume so high anymore to hear over the wind). Anyway, just something to consider as a longterm solution that will pay for itself many times over.
http://www.earinc.com/m-motorsports.php