New Server

If you don't have too many user accounts and websites.. and don't mind building from scratch...then you would be good to go.  SBS will be your domain controller...regarding the Trial...once you migrate, you commit yourself.. so taek a leap of faith into the 21st century :-)

I would only migrate if you have some extremely compelling reason to do so.  Since you are using SBS, I am assuming you have a relatively low number of user accounts so it looks like a fresh new AD installation is your best option.

NT migrations generally cause headaches - avoid it if you can.

I am a little lost with building from scratch, only because I have never worked with SBS 2003, or IIS 6.0. So you might say I am terrified to do it from scratch. All the configurations are in the NT PDC, and I just would like to get them over to the new server.  So I guess I am going in blind. There are not but 30 user accounts - so I am okay in that aspect. It is going to be like waking up, I am not home, and I have no clue how to get there! This is why I chose the migration.

are you installing this on another box?

Yes - a dell power edge 1800

Still, with lack of experience I would still recommend a clean install...an upgrade could lead to more complicated problems (much more complicated than creating a new domain with 30 user accounts)

Do a little research and create a new domain - just my opinion.

@vsg375...the question "do you think I would be better off upgrading the existing NT domain controller before migrating to the new server?"
has been answered in my 1st comment

cool. .thank you!