I'll sell my Swarovski's when I have to argue they are just as good as Bushnells (or leupolds or vortex) I'll sell my ten when
a. it gets too heavy! or
b. when I have to argue that it is "just as good as a twelve"

10's (if you can handload for them) are just the cat's ass for anything big or at longer range.

Do you NEED one? Of course not but you should WANT one! Now the choice between pump/double/auto gets interesting. Nice double up above btw...

I have had 3 BPS 10's and they just keep killing birds, from pheasants to turkeys. Load down to 1-1/4 of lead (pheasants)to 2-1/2 oz for turkeys.

For honkers a swarm of 1-1/2 oz bb's at 1500+ fps is good.