Choosing between SQL 2005 Express or SQL standard/Enterprise for the VC database

VMware VirtualCenter uses standard the Micrososft SQL Express 2005 database. The statement of VMware is:

Microsoft SQL Server 2005 Express is intended to be used for small deployments of up to 5 hosts and 50 virtual machines

Microsoft SQL 2005 Expresss supports 1 CPU, 1 GB of RAM and a maximum database size of 4 GB.

Thanks ablej for pointing.