Best path to upgrade from 3.8.x to 4.0?
 

I have vBulletin 3.8 installed and I'm looking forward to upgrading to 4.0

I'm thinking about setting up a "test" instance of vBulletin 4.0 on a separate server with the same database as the "main" server and then trying to get things working from there.

Is this a good path to take? Can anyone provide some tips on how I would replicate the server and then "switch" them?

What about vBseo? Can anyone help me remove that? I'd like to go back to the original vBulletin rewrite system (so I don't have to worry about addons in the future. I rather have a slim software package)

Thanks.