I agree with everyone here at the post. You need to answer a lot of internal questions:
- How many hosts will I have over the next 12 months
- How many VMs will I have over the next 12 months - this is very important especially with Version 5 License... will explain below.
- What will the VMs be doing - performance wise. This leads back to the first two questions.
If you can get close to answering these.. granted it can be very hard, you will be ahead of the curve for your request. All your hosts should be ESXi, dont even think of getting ESX 4.0. Also Licensing from Version 4 to Version 5 has changed. While version 4 licenses are still availible, you will want to plan for version 5. The key is Virtual Memory. Make sure your licenses from VMWare will support all of the VMs you are planning to install should/when you move to version 5. Before with version 4 it was all about the Hosts configuration, now that is no longer the case.
VMWare has a number of partners that will work with many different size clients. Contact a VMWare SMB Rep and they will point you in the right direction of a partner.
Thanks
Boston Tech Guy