Some I have, Some I don't, but this is my ideal list, any shortcomings you see? What else do I need? or don't need? Rifle list....don't worry about shotguns/muzzleloaders.

.22 LR
.22-250 Rem.
.243 Win.
.270 Win.
.300 Win. Mag. (might trade for a.300 WSM lightweight model)
.340 Wby.
.375Ruger? H&H?
.416? (which .416? Rem? Rigby? Ruger/wildcat?)
.458 Lott

.577 NE (dream double, maybe one day...)

also have a 6.5mm Rem. Mag and a .30-30, though I don't include them in my ideal list.