Hardware to Build a new VMware ESX server

Hello,

   I was referred to this site by Chad S. and he informed me thatthis site would be a great resource for my question.

    I am looking to build a ESX server for arount $450 + or -.  My goal is to have approximately 12 VM’s running

-          2 Networker servers (clustered)

-          1 HomeBase server

-          1 Netbackup Server

-          1 DPA server

-          1 Avamar virtual edition server

-          1 Celerra Emulation server

-          2 Windows clients

-          1 Solaris x86 client

-          1 Redhat client

   What hardware would you believe will be appropriate in order for this setup to run efficiently?  I have reviewed http://virtualgeek.typepad.com/virtual_geek/2008/06/building-a-home.html but much of the hardware listed is no longer available.  My primary interest are in a Motherboard that can handle 12GB of memory.  If 12GB of memory is overkill for the config above then I am all ears to a MB that has 8GB as well.  Therefore recommendations on a MB and processor would greatly be appreciated.

   Thanks for anything you can offer me in advance