[Users] Using oVirt in mini datacenter

Hi Guyz, I have a requirement to compare vCenter features with oVirt in data center usage. I have a done a deep comparison of features and oVirt seems to be a good opensource alternative for Vmware. Can some one provide a lab requirement for setting up a mini oVirt setup. Does it require a dedicated DHCP and DNS server? My Requirement: To setup a mini datacenter using oVirt for demo purpose and feature comoparison with Vmware. I need HA , load balancing an fault tolerance. I also need to setup authetication with our current corp email address which is based on AD. This is what i was able to figure out. 1. At least three physical servers . 2. One shared storage among the 3 servers [for live migration] 3. A DHCP server running on Linux [OR can i use my existing DHCP server which is running in Windows] 4. A DNS server [Or can i use an existing DNS server] What else is required.. Please help... Regards, Novel