I don't think there are many rifles that can do a 2 inch group regardless of shooter at 1000. If i'm doing my math right (very possible that I'm not) that'd be a .2 moa rifle correct?
I had a bushnell 10x mildot mil/mil adjustments mounted on my 308 for a while I really liked it. Bushnell actually fixed it when i had problems with it (which surprised me and I've yet to remount it) but I don't think I've heard of anyone else having the issue I did. I think barrett puts the bushnell 10x on their 50 cal packages so that's an endorsement in itself.
I personally prefer fixed power scopes but there is nothing wrong with a variable.