I have the Bushnell 800. The max range on them is 1,000 yards, which is way more than what I need, although I must say that it is kinda fun to guess the distance of a particular object, and then use the 1,000 yard-capable range finder to find out.
Truth be told, for shots under 200 yards or so, you really don't need a rangefinder. As such, given that I hardly ever take shots over 200 yards anyway, then that would mean that I don't need a laser rangefinder. Still, for whatever it's worth, I like having them and just knowing the distance.
I bought my 800s about 3 years ago for about $275 or so. I agree that the 450s at $150 should be great for what you need.
Zachary