RE: Combo-v-rangefinder & bino seperately?
I would recommend that you physically look through a bunch of them before deciding. I checked out the Bushnell combo and I can say that they had some of the worst optics I've ever seen that cost more than $40. I can't believe they're trying to get $500 for those things. My hunch is that you'll be far better off with individual optics. My theory is "suitable for both is good for neither".
Good luck.