...Costco is running a $200-off sale on 43" LG 4K monitors with built-in 10W speakers, so down from "around $650" to the "just over $450" range [assuming your state has sales tax].
I ran the specs by my network guy and he said it was an OK device.

I think there were 3 of the inputs at 60fps, and 3 more at only 30fps. (But memory may be playing me false, too. I plugged in a laptop [DisplayPort, which now carries sound] and an XBoxOne and called it done.)

Sure looks purty.

.

No SD card slot, like my old Panasonic TV had, but otherwise seems to be doing pretty well by me.

And DAMN but don't that fixed-font text look sharp and crisp!