[audioquest4life]

I opted to use a solid core wood door from Home Depot. I went for specifications and look as well. I forgot the door brand, but it was pricey and came with a custom reinforcing sound mitigating frame. All in, almost 2.5k. I already have a double wall with heavily acoustic treated things such as Quietrock sheet rock and Roxul safe and sound with two inch spacing between walls.

The door opens into the game room, so ultimate soundproofing was not necessary, and the results with the solid core door are more than reasonable for my use. Remember, depending on your room layout and code, your air gap between the floor and door, or lack of, may mandate an air vent above door to allow fresh air transfer between the rooms. If you are building a fully dedicated studio and sound abatement is necessary then your build options will be different. But, for general sound mitigation for a movie theater or listening room, I find what I did works perfectly. Good luck.