I'm getting close to moving up to a little better scope and the razor is one of my top choices. I've been shooting a pst for the last two years and am very pleased with it but have the itch for a nicer scope. I'm wanting to hear from some that have been shooting this scope to see what you think of it. I hear the glass is excellent but how would you compare it with other brands such as NF, Luepold, bushnells. Do you think it will be as durable over time as the others? Thanks.