You may be confusing a VX 6 with 6x. The VX6 is top of the line from Leupold and a 6x scope is merely the power magnification. Both are very popular though.
Not even close to top of the line.
Look at the Mark series, especially the Mark 8
http://www.leupold.com/tactical/scopes/mark-8-riflescopes/mark-8-3-5-25x56mm-m5b2-front-focal/3-5 times the money of the VX6
