You do not want a 308 AR. (If you gotta have, get a damn scar)
Get your pistol, your reasoning there is sound.
If you want the AK, your selection there is sound too (or just build a BCM/DD/PSA AR for the same money). AK ammo is cheaper, maybe that's reason enough to get the AK.
10/22 of your choice is also good, I don't have any use for the takedown one, but whatevs. I never shoot mine, because why show up at the range with a 22 when you can bust 556 all day long? But I like having it, it's sort of one of those things everyone should just have as a citizen or something.





