I have been wanting a Razor 5-20x50 but they are a little out of my price range, the Viper scopes look nice at a more reasonable price, but I don't know anyone personally who has used one to see how they liked it. Is it rugged, does it make repeatable adjustments, is the glass clear, and so on. Ive always used some of the more budget friendly scopes in the past and am looking for something that can help me reach out there by dialing in the dope instead of guessing. The SPARC has had me interested for a while too, I have a couple of rim fires I would like to mount one on for my kids, I think they make aiming much quicker and shooting more fun for them.