^Wait, are you saying that you can't position the TV closer than 15 feet or further due to space? I'm like blind so my TV is not too far from my bed, and when I play video games I have to sit like directly in front of it xD haha.
i brought my 42 inch plasma and it was the perfect size. Any larger and it would just be too much. Also you're dorm WILL probably be the hangout spot. When I first moved in the thought of this sounded cool but it got super annoying after a month. Basically I got annoyed with the more obnoxious floormates who frequented my room.