Virtualmin is one of the most cost effective and powerful web hosting control panels on the market. The ultimate rival to Cpanel, Plesk and Ensim. Virtualmin has a feature set that allows the most advanced user full control to their respective accout (Apache config files, DNS zone management) and more.
But it also has one of the best interfaces for the beginner user. If you're the type of person that doesn't want to get into too many technical details it will still allow you to run your website and email with ease and scalability.