Puppet and Cfengine for management

Recently I have been reading more about managing multiple systems. One project I've heard good things about is Puppet.

Puppet lets you centrally manage every important aspect of your system using a cross-platform specification language that manages all the separate elements normally aggregated in different files, like users, cron jobs, and hosts, along with obviously discrete elements like packages, services, and files.

I also know another common choice is Cfengine.

Cfengine is an automated suite of programs for configuring and maintaining Unix-like computers.

After reading about each project, I am leaning towards trying Puppet.