Simple HT Questions

So I recently got the speaker bug and outfitted my new homes living area with an ok setup. Its way too big to be used for a HT, like 25x20x20 and open to foyer/dining. I am looking to get into that HT cinema feeling.

I have two rooms upstairs as potential candidates and need some feedback from you guys. They are both 10x14x8, which is not tiny, but definitely not big either.

- Is this size even optimal for a HT?
- Also, one is carpeted and one is wood. I am pretty confident the answer is to go with carpet, but just asking in case wood will help make the room seem larger.

My current speaker setup is below. I can move this upstairs or get a new setup, either way I will have to buy at least 1 setup (replacing living or new for HT)

- Polk Monitor 70's Fronts
- Polk CS2 Center
- Polk Monitor 40's Rears
- Epik Legend Sub
- Denon 2112CI

What would be the maximum size screen I should go with being about 12 feet away? I currently have a 52 LCD, but plan to leave that in the living. I would love to get a projector, but am not sure I would get all the benefit out of it in such a small room.

Thank you for the input.

I plan to do the following:

- 1080p projector set to 100" or more
- Move my polks upstairs to the HT.
- Paint the walls deep red / gray etc, the screen wall black.
- Move a large sofa/chaise lounge into the room.

I am having a hard time finding threads that have basic information around HT setups.

- What should I use for the screen? I saw some people DIY, some get expensive, etc.
- Should I use anything on the walls for sound proofing?

Looks like decent prices, ill look into them.

What should I do about the walls. Currently I just plan to pain them dark. Should I do anything additional before painting? Is there any particular paint that might be better for sound proof or should I just paint it and test. If its echoing, I can make some DIY sound absorption boards.