Get a standard 144hz monitor.
Freesync is not useful unless you have anything less than a 970 in terms of graphical power, in which case you probably shouldn't even be considering a 144Hz monitor, going for a new GPU instead!
😱
Get the BenQ XL2411Z or the Asus VG248QE, whichever is cheaper, as they use the exact same panel.
Comes down to aesthetics really!

VG248QE:
https://www.amazon.com/dp/B00B2HH7G0/?tag=pcpapi-20
BenQ:
https://www.amazon.com/dp/B00ITORITU/?tag=pcpapi-20
If you want to save $50, but still want 144hz get this: https://www.bhphotovideo.com/c/product/1073477-REG/acer_um_fg6aa_b01_gn246hl_bbid_24_3d_ready.html