the problem is, once you find them in store, they all look alike due to the fluorescent indoor lighting. I have a pair of vortex kaibab's for long range shooting/spotting. from what I had been reading 8-12x are good handheld if not using on tripod (hunting, looking at targets your getting ready to engage in, etc). anything over 12x, a tripod is almost imperative. with that being said, my father and brother in law were impressed with my 15x kaibab's and found 2 vipers 15x in the bargain cave in cabelas for hunting. they don't do any sort of long range shooting, and if they did, they would borrow my stuff. I was able to put my kaibab's on my tripod, then put their vipers on top of my binos. during the fall time, we go up to their farm and watch the deer until dark. I was throughly impressed with vipers low light capabilities. clarity wasn't as crisp and the side to side wasn't as clear as my kaibab's. now our family doesn't own an pair of razors, but I know when I had my razor spotter, it was excellent glass. I've looked and did a side by side comparison with the swaro slc 15, and to be honest, there's nothing close to it, they are amazing, but so is the price tag. just do a little reading, and if it's something you see yourself using for a long time, I've always said, some things you can't skimp on. the old adage, "buy once, cry once". good luck