Well, if you used MakeHuman, you could do it with a high detail mesh, focus on the face entirely, as nothing else is seen in the original. Add a hair background. Once again, this isn't real time so the poly count can be as high as you want/need. you also don't need UVs or anything like that. If you don't want to spend the time rendering it, my new machine is pretty much built for rendering CGI. I have only used it for games and setting up linux since I got it last week, but I did some test renders of scenes and they are done almost 3 times as fast as before.
An idea of how fast: 300,000+ faces in 17~30 seconds at 640*480 with raytracing and particles. Before it took a minute per frame.