Derek,
If you are not going to have any land lines, a basic setup would be like this.
I'm a fan of punching down the incoming lines and using patch cables to do the connecting. For me, it provides an easy way to change and tweak things. However, you can terminate the incoming lines with RJ-45 plugs and for go the below module.
8 pork network interface - 363486-01
You can get OnQ's switch and router, they will fit in the can no problem, but they are overpriced. If you don't mind a little more work, get a switch and router you like and use industrial velcro to secure them. Use 1 or 3 foot patch cords to connect the network interface module with the switch and the switch with the router.
For simple RF (cable and antenna) distrubution you can use:
2x16 enhanced video - 364522-01 (or however many ports you use). You want an amplified block because of the large number of splits. You can use a 1x1 amp then go to a passive block, but it's just more connections and modules for the same thing.
If you do satilite, it will require a multiswitch.
Power strip - 364266-01
Lastly, I'm not sure if OnQ has a mounting plate for the Elk, but if they do, you could pick that up.
Hope this helps.
--Jamie