The most recent updates definately look better but still need some work. You might try using a lattice as a quick way to reign your shape in. The nose and mouth are still too wide. Also, if you look at it from the side persp; the entire head needs to be rotated about 10 degrees CW, and pulled back a bit. I hope that makes sense You may also want to start killing some of the tris while you still have a low res model.

Cheers,
Penguin