I have the 10x42's. I had the old Cascade 10x42's, but one of the eye cups broke. I sent them in for repair, and got a set of the BX3's back. The BX3's are a lot better than my old Cascades, I'm pretty impressed. For the money, I think they may be nicer than the Vortex Vipers, but I haven't compared them side by side yet.