Your only choices for over 1080 resolution and 60Hz+ refresh rates would be overclockable Korean 1440p monitors like the Qnix QX2710 / Evolution II, and XStar DP2710, which you can find around the $300 mark depending on vendor. If you want to wait for a brand-name monitor that sports native 120Hz @ 2560x1440, you're going to have to wait for the Asus ROG Swift, but it'll cost somewhere around $800.