Good job John, I thought it was a scan from the very first image, the skull cap and tilt in the neck were an instant giveaway, still a nice job on the retopo....

You should of downloaded a 30day trial of 3dcoat, it works fine and saves and exports too even for the trial version, you could have the model done in a day from using that, including a very rough yet useable uv layout as it maps it accordingly as you model, I use 3d coat on all our scan data at work, its super fast

Jay