Runtime DNA has WildSide Hair for M3 that has a very nice look to it. The Loki hair is long but seems like it might be too "unkept" looking for your purposes. Hair is pretty interchangeable so if you find a V3 hairstyle you like, it can be adjusted for Michael. He won't mind. I rather like 3Dream Egypt hair. Shahara's Steps make it super easy to fit to other figures. Same with the Agent hair (which I realize is not what you are looking for).