NightHunter,
NiteEater spotties are designed by and for roo shooters. they are by far and away the best spotlight for shooting under. However, there is no one im aware of that can consistantly shoot to even 3/4 the length of the beam. In a good scope you can clearly see targets at 1-1.2km. Also the price tag is pretty scary. The small one start at about $600. big ones fetch $900+.
The big Powerbeam($120+) and big Lightforce($150+) get aboutr half of that. and again very few people can consistanly head shoot at that range. The smaller Powabeam and lightforce are ideal for the keen spotlighter. provided ample light to 400m to shoot under and dont cost an arm and a leg. Around the ($100+)mark.
Cheers J