I was recently looking for a monitor and I noticed that monitors with Displayport are significantly more expensive than the rest. For example a decent 22' ASUS monitor without Displayport cost around 150$, but a 22' ASUS monitor with Displayport costs another 80$.
Is the difference between Displayport and HDMI/DVI image quality so big, and is it worth paying those 80$?
I would like to hear your thoughts on the matter
The only reason you will need display port is if you want 3rd monitor in your set-up in which case the output from the graphics cards should come from the display port. Since buying 3 DP monitors just to be able to use the 3rd one is not cost effective, it is better to buy non-DP monitors & buy a single active DP to DVI adaptor for much lesser price. Or get the Sapphire Flex version to totally do away with display port for the 3rd monitor.