Cristian_24 :
Max screen size for a 1080p monitor is 24in and for 1440p 27in. Budget. For 1080p in the $100 area and $250 for a 1440p
Acer does make a cheaper 27" 1440p60fps monitor but the reviews are kinda mixed so take aty look at this 25" 1440p60fps monitor
http://www.newegg.com/Product/Product.aspx?Item=N82E16824009728&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=
If you want 1080p then spend a little less cash on the Asus monitor im linking below. Ive had it since it 1st came out and its one of the best monitors Ive ever had.
http://pcpartpicker.com/part/asus-monitor-vg248qe