This is basically a wrap up of my previous blog posts here and here. A couple weeks ago we decided to go with VMware ESXi. The performance factor was probably a deciding point. Our Windows 2000/2003 servers were probably running up to 2 to 3 times faster on our VMware ESXi servers as opposed to the Hyper-V servers. Deployment was easier as well. Hyper-V had some advantages though, such as backups were easier and migrating Windows Virtual Server machines would be easier. Those few advantages though was not enough, and we decided to go with VMware. Hopefully my company will pony up the cash so we can go to the Enterprise edition. That is another battle altogether :).