Unfortunately, the speakers in the QNED85 are the weakest part of the television. They are prone to distortion at higher volumes, so do be wary if this is the television you choose. The QNED85 supports a good amount of audio codecs, and the included inputs and outputs allow for setting up a sound bar or sound system.
By comparison, the LG C3 should have speakers on par with the C2, which are excellent if a bit lacking in bass. They should exhibit minimal distortion at higher volumes, and of course the requisite outputs for a sound system are also included.