I have Vortex Razor 10x42s and love them. I bought mine from A&A Optics for about $800, refurbished. They have the Razor HD in 10x42 for $725 right now. When I called Vortex (always great customer service), they told me A&A is the only company they send refurbished products to. I have bought several other Vortex products from A&A, all good experiences. I have looked through my buddies Swaros beside my Razors in low light conditions, and I could tell a very slight difference, but nothing worth double the cost. Those Razor HD's are an upgrade from my Razors too. I'm sure their is even less of a difference between the HD's and Swaros.