144hz G-Sync 24'' Gaming Monitor Advice

Again, the above monitor is 2560x1440 but you can drop a game to 1920x1080 if your CPU/GPU hardware can't keep up.

Since it's GSYNC you don't need to worry about staying ABOVE a specific target, so for most games as long as you get at least 50FPS average you're probably okay.

A few games require your to force 60FPS in the settings (for the game itself) to avoid issues. Many of the Bethesda games require this.