Contrast is impacted by two things, black levels and peak light output. A higher gain screen will boost both, meaning blacks won't be as "black" but brigher whites will make things appear to have more contrast.
I would say that those CR specs are mostly useless since they're engineered to look...
Corey,
Welcome to HTF!
Based upon your description of your viewing environment, I would infer you are after improved contrast more than anything. Grey screens can be great, but also come with compromises in color reproduction, so in your light controlled room I would not go that route.
My...