Make sure you meet the minimum requirements list in http://www.vmware.com/pdf/vi3_35/esx_3/r35/vi3_35_25_installation_guide.pdf
For the database sizing you might want to tun your figures through the Virtual Center Database Sizing Calculator
Review the load on the current system as a guide for the load in your environment.
Are you going to be running VC plus the database on the same box, maybe just add some extra RAM.
Considering awarding points if this is of use
Rodos
{size:10px}{color:gray}Consider the use of the helpful or correct buttons to award points.
Blog: http://rodos.haywood.org/{color}{size}
