Some additional points...
1. I do not need to RDP to my exam rooms. I do have two other computers outside the exam rooms running Win7Pro and Win8Pro.
2. Data is planned to be stored on the above Pro computers not on the exam room machines
3. I had a domain in the past when I experimented with eCW in 2005, not any more. Workgroup just works fine for me.
4. No need for group policy. Only me and my secretary in office.
5. Yes I was tempted to go for i5 but thought in the long run i7 might be better. May be I can return.
6. don't know much about Hyper V or Metro interface to comment.
1. It makes it a lot easier for your support to have RDP.
2., 3., 4. Perfectly OK to do peer to peer but if ever you change you are out.
5. The difference between i5 and i7 probably will not be as significant as Home to Pro.
Since you have already purchased them, it's probably a moot point. Doubt you can return unless they get more money from you and as you say, you have already shelled out a considerable sum.
