Yup, all of the above.
For whitetail in your scenario, I'd go with the 7-08 as a first choice.
The 7-08 is based on the 308 and Military 308 is still easy to get and often free, so when you start to load your own you may as well have free brass.
The 243 is also made from 308, but the 7-08 is simply a more versatile round and can be used on elk with more bullet weight if such a day ever comes. Necking down from 30 to 24 is ok, but going form 30 to 28 less of a jump.