The important thing when removing and moving granite is that the weight is evenly distributed to keep the pressure from being in any one spot leading to cracks. If you have 6-8 friends that can help you lift the countertops when you move them, that'll help immensely. You'll find that the granite is glued to the cabinets, and that's all that is holding them there.
so is that not something the cabinet people would do for us? we need to take care of it ourselves? (i don't mind paying the cabinet people extra to move it if it ensures that the whole thing won't break)