I think I may jump for the i7 2600 & the Intel BOXDQ67SWB3. The only unanswered question I have was what performance hit I will see on say a WD Black vs a SSD?
Huge difference.
If you're only using 1 or 2 VM's at a time it's not a big deal to put them both on one drive but they will crawl if they try to use the disk at the same time (run a Windows update or install a big program and the other VM is next to useless without 2 drives, or an SSD)