I'm looking pretty hard at the Vortex Viper 6.5-20x50 in a mil dot for my 600 yd 243 I'm putting together. It's $500 from Cameraland. You didn't really say what you're budget will allow on the scope...

http://www.cameralandny.com/optics/v...exviper6-20x50

I've bought several optics from Cameraland. Both Doug and Neil are super to deal with on the phone.

Just my 2 cents worth...