Tough call as I like all of the above choices. If you average .308 and .224 you get .266 so the swede it is unless you just had to have a Creedmoor. With 75 to 160 grain bullets the 6.5s are squarely in the middle but with out a redundant level of overlap of your other rifles. This season deer hunted with the Swede and next year it will be the 25-06 and a 6AI. Usually with a .243 along for the ride.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli