If you are worried about individuals having night vision than the best technique is a PVS-14 mounted behind and Aimpoint or an EOTech. If you have an IR laser and the other individuals have night vision, your toast.
The PVS-14 is very versatile because you can have it weapon mounted, helmet mounted (home defense / hunting you would need an IR Laser) or hand hold it.
The PVS-14 is going to have a wider field of view than a dedicated rifle scope. Most dedicated rifle scopes have magnification and a narrower field of view for hunting. (Probably not the correct choice if you are just scouting rooms).
You probably can find a PVS-14 for around $2,000 but we have found when customers compare lower end night vision (gen 2, blems, low specifications) to high end night vision (image clean, gen 3, best specifications) the money you would save is not worth the quality you are compromising.