Best monitor out of these three?

Solution
Try to aim for IPS. You will love the image quality.

The following monitor isn't 27 inch, but provides excellent build and image quality with a nice design (Small bezels):

Monitor: Asus VX239H 60Hz 23.0" Monitor (£142.01 @ Amazon UK)
Total: £142.01
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-04-15 14:43 BST+0100

In my opinion, 27-inch non-IPS screens will result in poor image quality and I don't think It's worth it.

If you really don't want anything else than those three the Asus VE278H is probably one of your better options.

RCFProd

Expert
Ambassador
Try to aim for IPS. You will love the image quality.

The following monitor isn't 27 inch, but provides excellent build and image quality with a nice design (Small bezels):

Monitor: Asus VX239H 60Hz 23.0" Monitor (£142.01 @ Amazon UK)
Total: £142.01
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-04-15 14:43 BST+0100

In my opinion, 27-inch non-IPS screens will result in poor image quality and I don't think It's worth it.

If you really don't want anything else than those three the Asus VE278H is probably one of your better options.
 
Solution