Photon XT is the best option in digital at about 500 plus the cost of a t20 ir light.
You might find a PVS4 gen2 scope for less than 1k, and might have to buy a mount for it, but you could still get in the total for less than 1k. PVS4's are good hardy scopes, but on the heavy side and the reticle is not so nice, but they do work well. I have both, and prefer the Photon as it is lighter and closer to the bore line. My PVS4 is a Gen3 and is nice, but it works best with a shooting stick.