As some with a “safe room” or vault type setup for strictly the games I can tell you it’s the best thing IMO. I don’t have to worry about kids getting to the games, the times something has to be serviced that’s in the basement (water hear or electrical panel for example) and my stress level is overall less knowing they can’t be seen unless I want you to see them.
If you starting with a blank slate things to consider are
1. lighting- do you want can lights, LED on shelves, display lighting. Lighting is honestly the single most important thing.
2. If you plan to have cameras down there consider placement so you can run power.
3. For you main /display sitting area. Surround sound? Dolby 5.1, 7.1, 7.2.4. Running the speaker wire ahead of time saves a ton of time
4. Where are you mounting Displays? Are you going to setup like SeeJayAre with CRTs in every corner. If so you need to plan for power
5. Are you planning to add centralized air condition system.
6. Do you have any potential for leaks? Is the water coming in thru the basement and visible.
7. are there any humidity issue in the basement? If so think about how to address
if you plan to use Cody’s system it’s very flexible. Map out your layout on paper and take corner turns into consideration so you don’t order more material than you need. I believe he mounted to the stud and skip a couple spots and plans to redo a couple areas. If studs are placed every 16” the it won’t sag but the upfront cost it higher.
Last thing I’ve ran into is how do you plan to display console boxes or controllers, if any.
starting from scratch is fun. Can’t wait to see the pictures of the progress.