First Home Theater! Help

Hi im new to this forum and im trying to get some ideas on how to finish my unfinished basement into a Home Theater. I have been looking around for some threads that were close to my design but havent found any. i have a room that is 38ft x 12 1/2ft and is 7 1/2ft tall. I want to split the room at 15 for a bar room and have a 23x12 theater room. We just started putting up the walls and would like to get some ideas from the ground up before we get to far into it. wall one is 12 1/2 wall 2 is 23 with no openings wall 3 is non exsisting and is 12 1/2 wide. i have to come up with an opening into the bar... archway, french doors etc and wall four has 2 - 36" doors one right at the start of the wall and the other one starts 55 inches from the end of the wall i also have duct work coming the length of this wall down 12in. I will try to get pictures on here so yall will know exactly what im working with