Hello VirtualRay,
below is picture from VMware sizing guide for VDI you will find much more useful info in this document:
https://www.vmware.com/files/pdf/view/Server-Storage-Sizing-Guide-Windows-7-TN.pdf
But its always better to do your own measurement through performance counters in vSphere client or by using ESXTOP.
For more info look at:
Regards,
P.