Guess one other thing I'd also keep in mind....generally speaking when you are dialing up to say 32 power...your eye relief gets closer to the scope. With a pretty big thumper....you don't need a :) above your eye. Lots of guys using the NXS 5.5-22x...you pick the 50 or 56mm flavor.... for big boomers. Certainly the other scopes mentioned are great as well. I will put in a plug for one more....the Premier Optics 5-25X.

Good Luck,

Wayne