Acer's new line of UHD monitors has been listed in Europe, but the Professional 280 is not available just yet.
However, the prices look promising. The Acer Professional CB280HK is priced at €499, while the B286HK should sell for €550. The monitors were announced a couple of weeks ago.
The spec is very similar. Both are 28-inch 3840x2160 units. The brightness rating is 300cd/m², static contrast is 1000:1, while the dynamic contrast is rated at 100000000:1. The reaction time appears to be the only difference - 2ms for the 280 model and 1ms for the 286 version.
As we are dealing with Acer's Professional series products, both can be pivoted between landscape and portrait mode. In terms of connectivity, the monitors feature HDMI 1.4a (MHL), DVI, DisplayPort 1.2 and Mini DisplayPort. There's also a VESA mount at the back and built in speakers, since architects and designers don't tend to buy 7.1 systems for the office.
The only competing 4K/UHD monitor that comes close in terms of pricing is Dell's Professional P2815Q, which also features a 28-inch 2160p panel. It has a response time of 5ms and it is limited to 30Hz at 3840x2160. The AOC u2868Pqu is a tad cheaper, but unlike the Dell it is hard to come by in Europe.