I bought mine years ago when the first came out. I have the Bushnell 400 and I strictly bowhunt. I range things from the tree just for the hell of it many times.

One thing I noticed is that even the 400 has trouble ranging a deer over 300 yards and even more trouble ranging anything smaller under that distance. I'm not sure how well the ranger finders over that distance work as well. Perhaps someone with a longer one can elaborate. I would assume that the longer the distance the range finder is capable of, like the 1000, the more accurate and percise it is in closer distances, say 300 or 400 yards. The 400 will only range very large objects at 400 yards, perhaps the 1000 yarders range 400 effieciently.

Also, my 400 will not range anything under 16 yards but what's the point anyway..lol

So, if possible, get the longest one you can afford so it's accurate to the shorter distances or maximum distances you wish to use them for.