Nikon make a good one for bow hunters, The archers choice. If youdo any rifle hunting as well you might wanna look into the bushnell scout arc 1000. it has both archery and rifle modes. it compinsates for angles and such.
If you are hunting from a tree stand I'ld go with any of the top rated ones that have the archery angles in them. Leupold makes a couple of nice ones along wtih the Nikon's. Just don't get caught up in gagetry while you are hunting. Learn how to tell distance by the size of an opject while you are looking at it with the naked eye. And when using a range finder do it when you get into the stand on trees bushes and rocks and not when a deer is walking in
There can be too much of a good thing with antler rattling.
I like to hit the horns together for a good 30- to 40-second rattling sequence and then hang them up and resist the urge to hit them again.
This works to the hunter's advantage, because if a buck has heard it, he may have been 300 or 400 yards away and he comes in and he's not exactly sure where it came from.
When finally is time to rattle again throw a slight change-up into the routine.
The second time, don't rattle as loud...