Chris,
All this depends on whether or not they install SWM, but that seems to be standard now so I would plan for that. There will be one RG-6 line from your dish to a splitter. Location of the splitter is usually in a basement or attic. Then you will run a single RG-6 wire from the splitter to each of the receivers and your cinema connection box. The cinema connection box is usually placed somewhere near your router, but you could put in CAT-5e from your router to your TV and put the cinema connection box there. Co-located with one of the TV's will be a power inserter for the SWM head in the dish.
I would let your installer run the line from your dish to your splitter since that really should be solid copper core wire and that is very hard to find in standard retail quantities. Unless you have serious compelling reasons (like all your runs are in-wall and you want to do the in-wall wiring yourself) you should also let the installer run one of the wires that goes from the TV with the power inserter to the splitter as well. Copper coated steel (which is most of the stuff you can buy at retail) is OK for RF but sucks for the 21 volts to the SWM. Also, unless you have the right equipment and connectors, leave them off for the installer to do. They have the right equipment for that.
I did all my pre-wire since it was basically in-wall or special routing. My installer asked if he could replace the dish to splitter wire with his and I agreed. Everything works just fine.
Enjoy,
Bob