There isn't one.
So you're saying the D9800 is the ONLY way to go for a 27'' solution?
No, he's not saying anything, which is typical.
Look at Rick Niemans stuff. They're highly regarded and he's helpful on the forums regardless of the monitor brand you choose.
I've got an older WG 27" (7000 series) that I got as new old stock and it's been fine, but WG are no longer highly regarded.