Julie, I like the way you have your main light placed. I would also use a hair light to get seperation from the background. If you have a boom, or can rig it up from the ceiling or just really high on the stand, that will make all the difference

When I do studio stuff (my goal) is to use the least amount of work in PS I can. With the amount of control you have, it is usually attainable. With women though I do a bunch of skin/wrinkle work and I do tend to burn the edges on almost all of them.