I'm going to suggest an alternative solution here - as this isn't a production environment (please correct me if I am wrong) then I would simply run Server 2008 R2 natively on the hardware. This will give you the best performance and easiest path of hooking up printers, scanners etc... into and still be able to use a KVM combo to control it rather than relying on software management only (ie rdp / vmware client) and configuring vmware pass through options.
Then I would run, using a guest hypervisor (ie hyperv, vmware workstation) then the guest linux OS inside that.