My monitor is 1920x1200 resolution, so anything 1920xwhatever or 1600xwhatever. I'll take anything larger than what you posted and put it in my wallpaper rotation queue.
It's nice to see something really cool that isn't a nude woman, anime-related, or weird MLP-furry crap! This picture has a excellent background and atmosphere effect to it and the submarine has a cool sci-fi look to it which makes this picture great. Keep up the good work!