Which databases are required to be moved in MOSS 2007 for upgrade to 2010?

Hi,

We are planning to upgrade MOSS 2007 environment to SharePoint 2010.  As a next step, I have to move the following databases.  Please correct me if we need to also move the Shared Services (SSP) content databases.

1. Content Databases of Main website (move required)
2. Content Databases of SSP (move required)
3. Content Databases of Central Admin. (move not required)

Thanks in advance!

LM