Is none of the above an option? Are those your choices because you already have them or are you contemplating buying them. If you are looking to buy something have you considered the AMD FX8320?
As a desktop CPU I'm not a fan of the AMD FX lineup. But for your stated purpose of a home lab, they work really, really well. I happen to have two of them.
On one I've got six windows server VM's running on it - keeping in mind that this is a lab environment where I'ts just one or sometimes two people hitting these servers. You don't need a whole lot of CPU power to do it so its a case where more cores can be an improvement over fewer but better cores. I also crammed this system with 32 GB of cheap RAM...once again for a home lab quantity counts more than ultra fast. Where I spent the money on this system was on an LSI hardware RAID card. When running muliple VM's, if they are on a single disk drive, the competition for the dist is the biggest problem. Since its a 99fx MB there is enough PCI Express lanes available for the X8 RAID card and the X4 dual port intel gigabit NIC
Hhint - ESXI doesn't like onboard NICs found on desktop class motherboards - if you want guaranteed compatibility go with Intel NIC's. Also, onboard RAID is problematic too. You want an actual hardware RAID card thats on the compatibility list or else cram the system with multiple single disks so each VM can have its own.
So, lots of RAM, RAID rather than single disks (or go with quantity on disks) and CPU is not all that critical. The AMD FX is lots of cores for cheap which is a good combination for this purpose.
See:
http://www.microcenter.com/site/products/amd_bundles.aspx
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