When i read the title .... "Should i buy new 1080p screen ?" ...I assumed that the link was intended to indicate one you were considering. be that as it may, if your are looking for a new "1080 screen" the two I listed remain the recommendation. It's all about what your goals and budget are ....
a) 1080p - I recommend a 144 Hz screen, TN w/ ability to run toasty strobelight for $250. G-Sync comes at $500 but if you gonna spend that much, then I'd go to 1440p.
http://www.blurbusters.com/easy-lightboost-toastyx-strobelight/
b) 1440p - I recommend a 165 Hz screen, IPS w/ G-Sync and ULMB for $700. Thge Acer XB271 HU and Asus PQ279Q usally run about that much but there was a run on them building up tot he holidays and prices climbed...