Remember that OSX makes fonts a lot thicker so this font looks insanely thin on other OSs. I'm on linux with ubuntu font rendering which is somewhat thicker than windows and it looks to thin to me.
Usually this means that it will look impossibly thin on Windows.
Usually this means that it will look impossibly thin on Windows.
Raleway medium would look better, or you could look at some other fonts like Lato http://www.google.com/fonts/specimen/Lato