I just recieved my brand new 6.5-20x50 Vortex Viper in Mil-Dot. It was less than $500 delivered from Paul at elknut.com he has the best prices on vortex optics
on the net. I haven't got it mounted on my gun yet, but so far looks great. If your not familure with Vortex optics they have a life time transferable warrenty, so it doesn't matter who bought it, if it breaks they will fix it forever. And they are based out of Wisconsin.
I also have a couple 4-12x40 diamondbacks, they are the next step down from the vipers. They are clearer than a VX-II and burris FF2 that I've owned.