Your best bet would be between these two units:
http://tnvc.com/items/night_vision_monoculars/pvs14g3_lit.html
http://tnvc.com/items/night_vision_monoculars/gt14g3b_pin.html
Of course, these recommendations are based on your initial price point. However, we do offer some more advanced units. I would definitely recommend looking into these, though they will be slightly out of your stated price range. But, with the LE discount, the difference would be relatively little.
Anyway, for you stated mission, I would strongly recommend a Gen3 tube. That is a given. But, with the added urban environments with street and head lights, you would want to seriously consider an ITT PINNACLE tube. You can read about PINNACLE on our website, but suffice to say, it is an enhancement to Gen3 that diffuses excess light so the user doesn’t become blinded by too much illumination coming into the tube. It also greatly reduces the halo effect seen around light sources and allows you to maintain your vision if you go into a room and some jackass turns on the lights.
I would also strongly recommend autogated systems. Both the units I recommended have autogated systems in place. Basically, this protects the tube from damage if it is exposed to too much light.
The first unit I linked to is a PVS-14 with an L3 Gen3 Autogated tube. It is a very clean tube and the PVS-14 is the standard issue night vision device for US Forces. This means that there are way more accessories made for this type of system than other body housings.
The second unit is the GT-14. It has a less advanced body housing, meaning it lacks some of the features found on the PVS-14, but it has an ITT Gen3 PINNACLE Autogated tube. So, the tube is a bit more advanced than the previous one.
We do offer LE department pricing, so if you talk to your chief and get everyone together, we could work a bulk order that would save you all money in the long run while getting you better gear at a better price. Give us a call and we would be happy to talk to you in depth.
-Chip