Looking to buy my first real spotting scope. I have a really cheap Winchester currently that is better served as a paper weight. A hunting partner has a vortex viper that I was very underwhelmed with. I want a quality spotter that I won't have to upgrade down the road. I only hunt Montana but hunt all over state from the dark timber to wide open prairies. I have been looking at the swarovski sts/ats line. Is there any other spotters in this price range that I should be looking at? I would love an stx/atx, but that is just outside of my justifiable costs for a piece of equipment.