Use the same license for both laptop and desktop

Check out your licensing agreements closely

This writer points out that you can use Microsoft Products on both laptop and desktop.

http://www.mytechguide.org/2010/08/02/microsoft-legally-allows-installation-use-of-microsoft-office-on-two-computers/

My advice is to go get a technet subscription - its cheaper

http://technet.microsoft.com/en-us/subscriptions/bb892756.aspx

or compare MSDN with Technet

http://msdn.microsoft.com/en-us/subscriptions/dd362338.aspx