There are a lot of choices on crossbows. I bought a 400fps Ten Point and it is very flat shooting out to 50 yards. I am an experienced bow shooter so judging yardage is something I have gotten pretty good at
I still have a range finder but use it to learn correct yardage when I first set up a tree stand or popup blind. I zero in on features like a big tree, stump or high grass in a field. Identifying whether a deer is 25 or 35 yards isn't that difficult for me and if I am off a little the flat shooting crossbow makes up for the error. One thing I will suggest is getting a crossbow with a cocking and de-cocking mechanism. Having to shoot into a target or into the dirt at the end of a hunt isn't good. I can cock mine using the built in crank right up in the tree and de-cock just as easily and all silently.