I am guessing that parallax adjustment on a pistol scope would be a lot more useful as there is a heck of a lot more chance for variable eye alignment than there is with a rifle where you have fairly consistent head placement on the stock. I think in my case since I am:
1) Shooting a rifle
2) Shooting over a fairly narrrow range of distances (of which the fixed parallax is set roughly in the middle)
3) Not using excessive magnification
The non-AO scope is the way to go (price and simplicity). I am guessing that there are a fair number of other guys who fit my category as well.
