A couple of months ago I wrote an article about some Cloud Solution that are out there.
A friend of mine how works at NetApp shared with me their solution for Cloud and Virtualization.
It's called FlexPod
The good thing about those solutions is that you can rely on them about the certification components, performance capacity , proof of concept, etc. It's just because the major players already made that for you.
so, here's another solution for your consideration when choosing your Cloud solution