Be aware that this is PHYSICAL processor, and not logical core.
For us, half the reason for virtualizing was the redundancy and resource management that vMotion offered. I can wholly understand the reason for wanting an Enterprise license, and I certainly wouldn't hold back.
4 x Dell R610 with dual processor and 32gb memory with fibre cards etc and VM enterprise plus acceleration kit for 8 processors with 3yr platinum support, MS Datacentre Server 2008 R2 x64 licence for each host box (allows you to put as many copies of Server 2008 (or downgrade to earlier versions) on each host box as you want, works out better than buying one licence per virtual server) £56k + VAT.
We only had the first year support, but that will/has to be ongoing, part of the agreement of buying VMWare if I remember.