You require an entry level server if you want to upgrade from a virtual hosting environment. You might either look at an entry level server (if you were really pushing the limits of your virtual host in terms of memory or CPU usage) or settle down for a VPS (Virtual Private Server), also called a VDS (Virtual Dedicated Server).  A VPS is a relatively recent addition to the web hosting arsenal, made practical by the success of virtualization softwares. In most cases, it makes sense to upgrade to a VPS, because of the cost savings involved. You still get almost as much control of the server at a lower cost & less elaborate setup routine.

On the other hand, an entry level dedicated server is useful for websites, portals or applications where the sizing demands a hardware configuration that is not available in a shared hardware environment. With the technology available today, you do not have to restrict yourself to either the hardware or software configurations. It is advisable to go for a virtualization setup, where you can run both proprietary & open source applications. On the hardware front, Webizus ensures scalability in terms of hardware resources & bandwidth availability, so that you do not have to go through another round of migration as soon as your website or application exceeds the capacity available with the current server.