If you're not planning on connecting to a separate soundbar or surround sound system, You might want to think more carefully about your set's audio performance. Look for a screen that can go as loud as you'll need without distortion or cabinet rattle. Consider how dialogue sounds and how much low-end rumble the bass is capable of.
Conversely, it's pointless paying out more cash for exceptional built-in speakers if you already have a decent home theater system.