Amazon offers the LG 34" 1080p Curved IPS LED-Backlit LCD Gaming Monitor, model no. 34UC79G-B, for $597 with free shipping. That's the lowest total price we could find by $100. It features a 2560x1080 (1080p) native resolution, 21:9 aspect ratio, 1ms motion blur reduction, LED backlight, and HDMI and USB inputs.
Note that it ships in two to five weeks.