If your doing quite a bit of mens hair cutting, you'll need a solid set of clippers. Clippers are built from a variety of different motors and even a small variety of blade materials. There are pivot motors, magnetic motors, and everything in betwee. Although Wahl and Andis make some of the most popular clippers around. We are CuttingHair.com are suckers for the Cordless stuff.
Forfex, owned by the Babyliss company makes some of the hottest Cordless clippers around. There new technology includes an ergonomic base with a ceramic toothed blade. You get approximately an hour of cut time on a full charge and perhaps the sexiest thing of all, if you forgot to charge it, you can plug it right into the base (via an extra cord) and run it as a corded clipper. Its the dominant winner in our book.