Having used Groove for the last three years and found it very useful we are finding it difficult to know what to choose to install on new computers.

Do you need SharePoint Workspace 2010 to use Microsoft Groove Server 2010 or can you install it on it's own? Is there any specific benefit of having SharePoint as opposed to Groove?

Do we purchase Office 2010 Professional or Professional Plus which comes with SharePoint Workspace or just get the basic package and purchase Groove seperately?