While searching to update my monitor I saw that ASUS at CES 2014 announced the new ASUS ROG Swift PG278Q. A brand new 27" gaming monitor and first of its kind.
It's going to be the first monitor with Resolution: 2560 × 1440 WQHD and 120+Hz refresh rate.
Also with the new technology from NVIDIA, G-SYNC, they say that this screen is just awesome!.
After a bit of more research the price will be around $800 (aprox. 550-600€).
ROG Swift PG278Q (extended spec list)
Display: 27-inch (16:9) wide screen
Resolution: 2560 × 1440 WQHD with 1ms response rate.
Connectivity: DisplayPort, USB 3.0 ports (upstream x 1, downstream × 3), 3.5mm earphone jack
Ergonomic Tilt (+20° ~ -5°), swivel (+60° ~ -60°), pivot (90° clockwise), height adjustment (0 ~ 120mm)
VESA wall mountable (100 × 100mm)