Been selling all my stuff to upgrade to high end glass. But before I spend $3000.00 on a optic, there's a couple scopes that won't let me click away from them. There is plenty of reviews and videos on the SWFA SS 5-20X50, And I'm sure its a great scope after having one of the fixed 10x. The US Optics ST-10 10x37 at its base price seems like a great scope, But I have never seen one, and cant find any detailed reviews or videos on it. The only thing that I don't seem to like though is the 37mm Objective. the differences between the two scopes are obvious. Fixed vs Variable, and so on. I don't need variable power on my scope. 10x is fine with me. If only someone with both could let me know what they think!