Ghosting is common on all monitors, it is worse for IPS screens as they have a slower response time. ULMB (Ultra Low Motion Blur) is a feature that is available on some high end monitors. This strobes the backlight in time with the refresh rate. This effectively lowers brightness but gets rid of nearly all ghosting. It is not available with G-Sync or Free-Sync enabled.
Tearing happens when the GPU's output of frames doesn't match the refresh rate of the monitor. V-sync is available on all contemporary monitors. This slaves the GPU to the screen so that it only sends a completed frame at the beginning of a refresh cycle. This can back fire when the GPU can't maintain the FPS to match the Hz of the monitor.
G-Sync and Free Sync operate by slaving the monitor to the GPU. The GPU then controls the refresh rate of the monitor to match the output frames of the GPU. It has limitations on the low-end and will basically switch back to V-sync to keep a smooth appearance. This can mean displaying the same frame multiple times.
G-sync and Free Sync, and to a greater degree V-Sync, cause input lag in the system. Since the Monitor is only going to draw complete frames there is a slight delay between what is happening and what you see. This is known as Input Lag.
This is why nearly all G-Sync and FreeSync monitors are very high refresh rates. More frames means less input lag and improved response times.
Your budget is too low for your wish list.
Here is a decent IPS monitor:
http://uk.pcpartpicker.com/product/Q8fp99/asus-monitor-vx279q
A very popular gaming monitor:
http://uk.pcpartpicker.com/product/rkphP6/asus-monitor-vg248qe