Holy Crap! That is starting to get serious proportions. Would not look bad on an indoor swimming pool for some rich dude villa. How many games fit in there?
Just to give you an idea, here's a quick test to show you one row of 'regular' cabinets... So you can guess the big amount of games I can put only in the V3! (and the games are even not 'side against side' in that test

) ... if I hadn't to put a Galaxian Theater of course


Since you have a light/white ceiling and pretty light walls I'd pick a dark color. Maybe the dark blue (2nd from right on the top row)?
The fabric looks a bit more rough than the carpet in the V1 and V2, is that right?
Yes, this gonna be a dark color, and very strong to resist the heavy weight of the games.
Consider blacklight carpet? It'll add quite an awesome punch.. 
well, it was my initial idea, but there is no shop around with these... I found some in Germany but the price is just ... too much! Keep in mind I have to order something like 85 square meters... Even a 'simple' carpet 'enough strong for this purpose' is something like 20-25€ per meter

What's with this door?
- Is it extra wide? Then your ceiling is really high
- Or is it extra short? For Sun?
It's an extra wide custom door....and the ceiling is really high! (almost 4 meters at this location)

The company didn't want to make such 'extra wide' door ...but I strongly insisted!