There's nothing that NEEDS doing (with a gun) that can't be handled by a shorty AR in 223, with a Ciener.22lr conversion, silencer, scope, luminous sights, an alloy framed 9mm commander and a Kimber Micro 9, altho you might want a .22 unit for one or both of the pistols. Add airsoft and .177 lead pellet guns for quiet practice without leaving home and man vs man training with airsoft, and you can handle it all. Better to be highly skilled with a couple that you can actually carry, than half arsed with a dozen, 10 of which you can't have with you.