The panel type wasn't listed, so I assumed TN. This is another reason why sites like I linked aren't well liked. I thought it odd a TN panel was listed for a similar price as the VA panel, but they were different companies.
IPS is superior to VA, so that's why it's more expensive. I wouldn't say 1080 and 27" is a bad mix. Though at that size it should be bigger than 1080. Your dot pitch and/or pixel size would be worse than the 24" monitors you are considering. I ran some older 26" 1080 panels and I wouldn't say they looked bad, but not as sharp as the 24" panel I have now. Personally I'd double check the HDMI 2.0 spec and buy that.