I am looking for a new replacement for my el cheapo spotting scope. I am looking at 60-60mm scopes due to I pack in. Most of the scopes are 15-45 zoom. My cheap scope is 60 and while I cant use 60 it does ok a little past 45. So the question is if I spend more on a scope will the zoom be better and I should be getting a 60 zoom scope or do most do only good to 45 and that is why thats all they sell? Thanks.