I have the same size tank and run 18 AI SOL Blue's.
How do you plan on the layout for the lights? I run 3 strings of six lights down the length of the tank and find that provides the best coverage.
I wish you the best on noise and the salt in the air, I just can't imagine a tank this size on carpet, let alone in a bedroom.
When I got rid of my 450g I completely gutted the room, put a drain in the floor (spills will happen), used shower surround on the walls and ceiling, completely caulked all gaps/holes, and put in two 8" exhaust fans and a 6" fan pulling fresh air in. I still know the salt in the air will affect other parts of my house.
Definitely would love to see more on how you are setting up yours.