Hi Thanks Please see below the answers.
Some questions.
1. Are the ESX 4 hosts in the cluster too?
NO. Its just a single physical machine where vSphere 4 (ESX 4.1) installed where have 02 Vms. Newly built platform at a different data center.
2. Do all hosts share a common datastore? NO. Its located on 2 different data centers.
3. Which vSpehere edition did you license?
ESX server (existing one) - vSphere 4 Essentials Licensed for 2 physical CPUs
ESXi Server (new one) - VMware vSphere 5 Enterprise Plus Licensed for 1 physical CPUs (unlimited cores per CPU)
4. What's the size of the VMs you need to migrate?
VM1
2 vCPU
3.5 GB RAM
250GB HDD
VM2
3 vCPU
6GB RAM
250GB HDD
Kind regards