I chose the fuelband because I know people who already have one. The social element is minor, but still somewhat helpful. The iOS app is really useful, and the device itself is really 'cool'. People swear by Fitbit or jawbone Up too. There are also some iOS apps that track a couple of those metrics on a budget. For my money, nike was the way to go.
Fitbit is another option as well. I've had that for about 3 months now and love it. I don't wear it when I sleep though, but for all other times. It helps me gauge days when I need to get more exercise in. http://www.fitbit.com