You should follow the panel manufacturer's recommendation on cable placement through the top and bottom holes.
On-Q and Leviton instructs for RG-6 to come down the top right holes and Cat5 down the top left holes.
On-Q modules usally mount on the left side of the panel and Leviton seems to be more free form.
The house that I just cabled has 5 levels, so rather than home run all cables to one location, I used two panels; one on the garage level for the first 2 levels, then one on the third level feeding the upper three floors. I then bridged the panels with two 2x2 bundles of structured cables.
The client is getting 11 zones of whole house Audio (Nuvo) and I used Siamese Cat5 and 16/4, home runned to his media closet.
Greyfox Cat5 Camera system will be installed and I decided to homerun the cat5 cables to the media closet as well. Each camera can get an input into the AV Receiver for viewing on the Plasma. Or to a camera card on a pc for viewing on the internet, etc. The cameras can also be modulated back to the panels to watch on any television in the house, but if the future homeowner subcribes to digital cable this can pose problems.
I believe that you should keep security in a dedicated panel, and not necessarily next to your other panels.
As you can probably tell there are many ways that you can run cabling for what you intend to install in your home. You can put everything in a panel(s) or distribute certain components to other places in the house that may be better suited for the task.
Good Luck!
