I just spent 13 hours on site helping a customer move their farm from one set of servers to another. Most of that time was due to the content indexes not restoring correctly. Without going into detail, let me please implore you to not attempt to restore the content indexes unless you're restoring to a single server topology. The PSS guy we had was about a blunt as one could be: “I would not try to restore any content indexes - it doesn't work very well”.
FYI.
Bill English
Mindsharp