What to use?

While I'm not quite there yet, it's almost time for me to take the plunge. Now I have a Gillette fusion power, would that be ok to use on my head? Or should I get a head shaver? And if so what are some good ones. I've seen a few different reviews, all picking a different top one. But the ones that are usually near the top are freebird, pitbull, and remington.