Rell: I understand the LOP issue, but your choice of top-end magnification for this type of rifle shouldn't be related to the size of the tube or dictated by the rifle's LOP. That's a different issue, and partly a mounting issue, depending on what mount & ring options are available for your rifle's receiver.

You mentioned the Bender 1-8x.
Beside the 2-7x, I also looked at some of the 2.5-8xs, as they were highly recommended by hunters who take shots over 200yds, but for my anticipated hunting (mine's a 300 H&H for use on African Plains game), the top-end of 7x should suffice for shots out to 300-350yds.
Most shots will be closer, I'm guessing, as PHs want to get the client as close as possible w/o spooking the game.

Whichever scope you ultimately settle on, the AHR rifle will be a great treasure in your collection!

Good hunting ...