This lil gem is on sale again till monday, acer 35" cz350ck bmiiphx ultrawide curved 1440p monitor w/ 100hz, and various reports state that it is compatible with gsync.
EDIT: I say "on sale again," but this monitor actually hasn't gone on sale at this price previously at least from what I've found, I was getting it mixed up with the other acer 34" ultrawide that is on sale at this $400 price point every now and then, the ED347CKR.
Haven't seen it posted this time around, felt the need to post it since just the brand alone has a much, much more reliable ring than the current monoprice 35" also on front page, which is also on sale for the same price.
3440 x 1440 Resolution
100 Hz Refresh Rate (reported OC'able))
4 ms Response
HDMI, DisplayPort Inputs
Adaptive-Sync Technology (reported G-sync compatible)
16.7 Million Color Support
Built in Speakers
1 x DP 1.2 + 1 x HDMI 1.4
$399.99 Free ship + selective state tax.
May jump on this as a secondary monitor to my aw3481dw.