actually, deserteagle, given the questions you're asking... PLEASE make sure you read the sticky by zak at the top of the rifle country forum before you spend that much money on a scope.
note at the bottom of his first post, the first/second focal plane issue. the ONE downside to leupold scopes is that their focal plane means the ranging reticles like mildots only work on the highest magnification. it was never a problem for me, really, but it bugs some people. if you're going with a target duplex, that won't matter at all.