Moving new/updated data files across network with permissions

This weekend I am moving all our corporate data from one 2003 server to another 2003 R2 server. I have duplicated most of the 65 gigs of data about two months ago using SyncToy, which unfortunately does not take security permissions. I want to to copy anything that has changed, been added or deleted (I can treat this case differently) since then and I want the security permissions to come over, too.

I am willing to do the whole copy all over again if it's easier.

What is the best way to do this? A software tool? Command-line? If command-line, what are the switches I need?

Thanks!