The overall shape looks good Ben but be good to also see a wire frame to help get a better idea as to how the geometry is put together. My method is to keep things as low as possible when modeling, keeping in mind where the details are going to be. This enables me to then go back and begin improving the model by adding details. This also makes life easier when adapting areas and will allow you to change the edge flow quickly to accommodate what is needed. Not sure if others use it but I always hit 3 to show the model when subdivided. I tend to work with this on the majority of the time and find it a great help. If you could get a wire up it would be a great help though and enable me to give you some advice on the model.