Well I decided on the Leupold 2x7x33 shotgun scope.
About a month ago, I purchased a 12 gauge USH for myself and this is the scope I put on it and felt very comfortable in doing so.
At the same time I purchased a 20 gauge USH youth model for my son and put a 1.5x4.5 Bushnell Banner on it. Realistically, this scope would have been just fine for him now.
But the wheels started turning and I began thinking long range to the time when he'd outgrow the Y/M in a couple years and either want to upgrade to the adult size laminate stocks or trade it in towards a new USH 20 ga deluxe.
Also coming into play is the likelihood, as I'm not getting any younger and my vision isn't getting any better, that the 20 gauge will probably be my gun of choice down the road. Let the kid carry around that 12 gauge canon!
So instead of buying a cheaper scope now and wanting to upgrade to a better scope at a later date, let's just do it right from the start and equip the 20 gauge for any situation it might be used for by either my son or myself for years to come.
The gun dealer was more than gracious is giving me full credit on the Bushnell towards the purchase of the Leupold.
Thank you all for your suggestions.