Micro Center[microcenter.com] currently has the Philips Momentum 326M6FJSB on sale for $279.99 (store pickup). This looks to be a decent price on a 2560x1440, 60Hz, IPS panel. Some additional features include:
AMD FreeSync Technology
VESA 100x100 compatible
Amazon[amazon.com] was the only other place I could find this monitor. It is currently $329.99 there.