Way too many unanswered questions. How many guests will there be? How much usable storage is needed. There are different levels of storage appliances that can meet certain criteria. For example, HP has a small size device (Lefthand or MSA). Then you can get into larger…

I have most experience with VMware, and have not worked with Microsoft 2012 Hyper-V. I know the new version of Microsoft has improved dramatically. My opinion is still in VMware's corner, but with everything else, this will be come a personal preference and feel with any…

Any of the levels of vSphere will give you the tools to migrate, yes. This gives you the ability to migrate from host to host and/or datastore to datastore.