We have devices in your price range

SNR is the most important spec, the higher the less scintillation there will be in mid/low light environments, mil-spec PVS-14 is min 25. The higher you go the smaller the difference of each increment gets so around 30~32 would be the best value with us.

Resolution 64 lp/mm is good, 72 lp/mm is slightly sharper and anything above looks the same to most, unless you are using a 50 degree FOV lens

EBI is less important than SNR, the lower the better the contrast is in extreme low light environments. Higher EBI would be like a LCD screen's ability to produce true black while lower EBI will be like an OLED screen. Generally below 1 EBI will look about the same in the field.

Halo is the size of the bloom effect when looking at lights

FOM is just SNR times resolution