I've been quite pleased with my Bushnell 800. I've checked it out on known distances, and it correlates within one yard at 440. Picks up well on highly reflective objects at over 800. 3X magnification.
Nikon riflehunter 550 here. No issues at all. I have cross referenced as well and its right on. We can't use rifles here so my distances are about 150 and under. It also has the angle compensation for elevated ranging. I think I paid around 250.