One important element in a SOC is the workplace and in general the facilities, let's see them.
The ideal workplace for a SOC is an openspace. There should be no walls between analysts. They need to analyze all together the events and discuss without boundaries.
The access to the openspace should be protected and just authorized people should be allowed to enter the room. Pay attention to the floating floor and roof: there should be no possibility of easly exploting it to bypass the access restrictions.
One phone (with headset), 2 computers: one connected to the internet, the other connected to the SOC management network. The desks should be positioned like an "half moon", infact every analyst should be able to clearly see the videowall.
Every SOC has a videowall. I would suggest to compose it with LCDs and not with lamps. Lamps are cheaper at the beginning but have huge costs of maintainance.
The SOC management network should be segregated by a firewall (and IPS) from the rest of the company network.
An example of how a SOC should look like is here.