Symantec is coming out with a lightweight version of 11 MR4, i.e. SB12. Both versions will allow you to setup a management server from where you can push out definitions to all clients as well as controls policies such as scan policies, exclusions, network threat protection, firewlal policies etc...
For the laptops enable Liveupdate option for users so that they can connect to the internet and download defs. whilst on the network the managed server will push out the defs to the clients