Razors for shaving

When I started shaving my head, the first thing that went through it (my head) was how would I do it without cutting myself. I researched several blades, and found several good options.

Head Blade - This is the razor I use every day. Its unique handle makes shaving a breeze.

Panasonic ES8023SC - This Panasonic electric razor came highly rated by several web sites for guys that shave their head. I don't use one, but my brother does.
Mach 3 Turbo - This new blade razor, has sonic pulses to improve closeness of your shave.