Monitors, all 1920x1080:
Some prices after rebate:
1) $240USD
TN, 1ms, 144Hz (already suggested)
http://pcpartpicker.com/part/asus-monitor-vg248qe
2) $133USD
TN, 2ms, 60Hz
http://pcpartpicker.com/part/asus-monitor-vs238hp
3) $144USD
IPS, 5ms, 60Hz
http://pcpartpicker.com/part/asus-monitor-vs239hp
Summary above:
Pros and cons with all. Second one is only 60Hz not 144Hz but also much cheaper.
The third one is IPS (better color/angles) but only 60Hz and some motion blur due to slightly higher response time of 5ms... I prefer IPS personally.
I wasn't quite sure of your maximum budget so thought I'd list a few with different features... note I couldn't find an IPS 144Hz that was 1920x1080; perhaps they're only in GSYNC/Freesync monitors? Not sure.
Other:
The best monitor would be the Acer Predator but it's very expensive. I just thought I'd mention it. It's got GSYNC, and is IPS, 4ms, 144Hz, 2560x1440.
Some quality issues on most or all GSYNC and FREESYNC monitors. Not sure if it's because technology is so new (likely) so hopefully another year will produce noticeably cheaper and better quality options.