As of right now the best monitor will the the lg 27UD68. It will cover all of your bases except 1, which is HDR. The monitor you found, I do not think will work well with xbox one x. I just looked at the link, not the actual spec sheet, but it seems that it does not have hdmi 2.0+ to get 60hz(60fps). As far as competitive is concerned, the lg 27UD68 will be perfect, however if you want a monitor to get the full use out of the xbox one, you need to wait. The LG32UD99 will come out soon, however it's HDR is not optimal due to peak brightness being 550nits not 1000nits. The perfect monitor for the xbox one will have 4k with a good rec2020, dvi and rgb color range, 5ms response time with less than 7ms input lag, hdmi2.0/2.1, freesync(not gsync-this is a waste of money for xbox one), HDR10 with 1000+nits max brightness with an avg between 350-450nits, the panel isnt a huge issue if you are looking straight on, but IPS will be the best. You want 27-34" monitor. If you are used to a 20-24" monitor now, I'd recommend 27/28. If you are used to a 27"+, Do not go smaller. I hope this helps. I know it is exciting to look now, but there will be better options closer to november.
