I'm confused with XenServer... I plan to buy a Dell R710 server and run XenServer on it. Dell can sell me a XenServer license with the server, I can choose between XenServer Express and Xen Server Enterprise. When I look at Citrix Web Site they talk about "XenServer" and "Citrix Essentials for XenServer". So, what's the difference between Dell's Express/Enterprise edition and Citrix Xenserver/Essentials?
and an other question: is XenCenter free?
Could you help me?