I'll be doing a quick transition between server installs either today or tomorrow.
Benefits, are; I'll only have to update content once (and they'll be live for all servers), and this is a clean install so I've recompiled most of our custom plugins and deleted old config files, so it's a lot cleaner.
The Valve stock balancer will also be functional in the new install. No scramble yet however, it'll come soon.
I haven't tested if everything works yet, that'll be done later today of course!
The rest of the servers will be going through the same but later (probably this weekend).
EDIT: Everything seems to work so I'll go ahead and do the transition tomorrow morning when nobody is online.