I like Direct Admin too. It's clean & self understood like Cpanel and good for entry level. But once your customer got fancy with their host, they'll ask for more.. Cpanel with Fantastico
mysticmind is right. Established company do understand their customers. Factor of cost and to be financially sounded hosting company also keep them staying. So if you want Cpanel, pull your pocket for more coins. Cpanel license aren't cheap for us.
Hive is getting Windows2000 server with HostingController and Unmetered bandwidth server with DirectAdmin soon. Choices huh?
Cpanel or Plesk? -- ask your customer.