I'm getting a scope for my Tikka 7mm Rem mag. I'm seriously considering a 3200 Elite 3-9x40 (no firefly) because I had one on the rifle I just sold and really liked it. But, now I notice there is a 4200 3-9x40 that is much less money than most of the other 4200's. Why is that scope cheaper than others in the 4200 line? Is there a big difference between the 3200's and 4200's? I don't shoot a lot, but want a good scope on my rifle. Thanks, Jim