Burris Signature Zee Scope Rings? Anyone use these? Concept seems good but I don't know if it's just marketing hype and good reviews from people that don't know any better. I'm considering them on a Rem700 SPS Varmint 308 with a Nikon Monarch 4-16x42 Mildot. Target shooting from bench or prone. Any thoughts or experience with these would be great.