SharePoint/SQL databases migration and upgrade

Hi,

Can someone tell me the correct upgrade/migration path for the following:

We have a SQL 2008 R1 server with SharePoint 2010 Content databases on hardware that needs replacing, so we are purchasing a new server and will install SQL 2008 R2 on the server. 

We will need to configure the new SQL 2008 R2 server to connect to our SharePoint 2010 server, and we will need to migrate our current R1 databases over to the new R2 server.

If anyone can advise on the easiest way to accomplish this, I would appreciate it.

Thanks.

Steve