Best way to move to a different host

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The review of this web host was started by datamerc on 2010-02-26 11:11:50:

I’m considering moving a number of sites from a VPS account to a dedicated server and would like to make sure there is no downtime during the transition. My biggest concerns in this move would be…

• Nameservers - all the sites are using the same vanity/custom nameserver and the DNS is hosted on the VPS. Would using a third-party service like DNS Made Easy make this (and any future) hosting change easier?
• SSL certificates - some of the sites are using SSL. If I reissue the cert and install on the new dedicated server, does that cancel out the one in use on the VPS?

Thanks in advance!

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