This depends on your requirements. For most sites, the Small Business Web Hosting package will be optimal. This gives you 1Gb disk space and 10Gb of traffic. You also get 20 email addresses. If your needs should grow over time, you can easily upgrade without any interruption to your service.
For WordPress / Joomla! or other CMS systems which require more resources, we recommend the Web Hosting Pro account
Questions, issues or concerns? I'd love to help you!