Put audio settings on hardware page
As a gamer I often find myself changing both the display and audio settings. The display to make my TV the primary one so Steam Big Picture opens on the right screen, and the audio to switch from headphones to the HDMI port that my AV-receiver is plugged in.
It'd be a lot less tedious, if the audio settings were on the same page as the video and other hardware settings. Makes sense in general, too, doesn't it? The audio are hardware settings, too.