I've been considering migrating for quite some time; and I've just come to the conclusion that I'm just tired of dealing with vBulletin and am ready to move on. But first; I have a couple questions that I would love your input; and if there is a professional service that would do everything for me; that would be great!
I currently run two vBulletin forums (7 million and 3 million posts, respectively), and am going to merge them (using vBulletin's impex; unless xenForo has a multiple import system). My main issue is that I need a search that works, migrate a vBulletin add-on (iTrader), blog, and a custom application (that mainly relies on vbulletin session for the userid).
Additionally, I need to rebuild the home page and associated custom pages (migration of vBAdvanced), and theme everything so that my members aren't too lost.
Obviously since this is a production environment; and can't have a lot of downtime.
Anyone well versed in the migration of a site/forum this size and is willing to quote me on getting things moved? I can provide more details over PM.