The only two that will fit your budget on Amazon are the AOC Agon AG271QX 27” and the Pixio PX276 27 inch. The pixio is $50 cheaper than the AOC and has an extra HDMI port. But the AOC has 4 usb ports, two 2.0 and two 3.0. Both have free sync, 27 inches, 1ms response time, 1440p and fit your budget.