OK... so heres how I'm doing it....
Get a large sterilite or rubbermaid container (enough to hold all of your rock and corals)
Use a power head and a hose to fill the container with your tank water. (not all the way)
As the container fills carefull start removing rock first (you may have to move around your corals to get to them)
Once you have all the rock in the container and it is fill so that it is covered, you can start moving equipment (powerheads, skimmers and such)
Leave the water thats in your tank there (it counts as a huge water change)
Get your choice of sand (south down or argonite) Make sure you rinse the argonite before you put it in or you will get something that looks like this (I have no idea how long this will take to clear up)
BTW sorry about the pic quality its a cemera phone :P
Here is my Temp setup
