I don't believe any of these monitors has decent audio but some have sufficient. There are alternative such as speakers or a headset. I use speakers during the day and at night late, earphones. The monitor video is where my focus would be for the selection along with making sure the ports you need on the choice is there.
Coming from an Apple Thunderbolt Display Monitor to the LG 27UL850-W, I can honestly say that the LG 27UL850-W's audio "sucks" onions in comparison.
But...then again, for monitor audio output for "general" applications...the LG 27UL850-W is...just ok.
Apple (from my opinion) has probably the best audio experience for what you can get in a Monitor (including laptops). But of course it comes with a hefty price.
Nothing replaces a decent external speakers or headset experience of course, but if you are just using a monitor audio for "general" audio needs (not high fidelity or the richness to hear the Lordofthestrings bow string's vibration or the maestro impressions on a Steinway's piano's keyboard etc., especially in the classics let's say..) there is little choice other than Apple's monitors (if you want an all inclusive).
Though Apple's latest offerings are maybe a little heavy on the bass (as the focused target market demands), they provide a decent audio experience more than the others.
For the price tag and for general audio needs...the LG does the job for what it is.