|Can you not build the new server, bring it up in the domain as a redundant DC and then just move as many services off the old DC to the new as possible thus keeping the old DC working as a redundanct DC also?|
This would give you two redundant DC's and some backup should one ever fail. Moving the load off the old server to the new one would be beneficial to performance on the old server.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.