jmweb is right, if your just moving cP to cP than you really don't need them unless you just do not wish to fool around with it, or the sites are a decent size. However regardless, websitemovers can help you with any moving project you have.
I've never used them, but I know two people who have --- and they were both happy. Wish I could be more help, but that's all I know. :-/
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