To give you the best answer, we would need a little more information regarding your project. Is this dedicated server hosting your busy ecommerce store? If so then you will need to make sure that the data center is fully certified and PCI compliant.
Will you be using this server for Minecraft hosting? In that case, you will want to make sure that your dedicated server has a good amount of RAM with SSD hard drives on a DDoS protected network.
What will you be using this server for primarily?