Windows Hyper-v vs VMware Infrastructure. Which would you go with?

HP DL380 (for virtualization). 6 146GB 10k SAS drives or 6 72GB 15k SAS
drives? (Assuming ESX. Will be running Windows 2K8 Standard Server
with SQL Server 2005 Standard. Netware for file, print, dhcp, and dns.
Possibly groupwise at some later point on SLES. Probably another Linux
distros for just some minor stuff like instant messaging.) The office
only has 18 seats. Don't believe I'll be taxing the servers that hard
no matter how hard I try.

I'm having to replace a six year old server that's slowly dying.