Thanks for the replies.
We will probably go with 6.0.1 with all the new updates. When they have the stable release of version 7, we will do the upgrade.
As far as migration. All we need actually just the users accounts and mails. So, we may do the following:
1. copy /home/e-smith/files/*
2. using lazy admin tool, do lat-dump from the old server, copy all the files generated to the new server, and do lat-restore on the new server
3. copy the /etc/passwd and /etc/shadow
It may not be the best approach, but what do you guys think about the user migration involving lat?
Thanks.