Get the additional dry rock you are going to need to get back to 1-2 lbs of rock per gallon.
Two days before you move them, i would make up about 20 gallons of new water and try and make that match as closely as possible to your old water. Get that up to temp the day of the move, and then put the fish in one bucket, corals and stuff in another.
Move over about half of your old water into the new tank, and then move the rock. Arrange as you wish, add the new dry rock so you have enough total rock. Move equipment move, move as much of the remaining water over as you can.
Then acclimated the fish and corals to the new tank water!
Voila! A new tank is born!