I would start with this, HOW far do you plan to shoot deer at?
as there is no reason to get a super high costing range finder if your not shooting far
and I never get how so many of the real far reading one's have such small 6-7 power magnification, very hard to be precide on a small target at 1000+ yards?
a slight off and your WAY off on things or can be
if I was ranging anything far I would spend the extra money and but a top shelf pair of binoculars with 10 power and a range finder built into them so I could be more accurate in my readings, and not have to carry two items with me
I have also owned a bunch of different range finders from ones that could read up to 7 miles away(russiam military that cost a few grand) to many of the hand held one's I also SOLD all sorts of them and been in the 1,000 yard plus shooting game since the 80's, as for my experience here goes!
the main question might be more valuable to know is again HOW far do you need to range game and plan to shoot at them at!
over kill is not always better! or money well spent!