I personally go with the new loads not for the hype but the twist rates as they give higher bc options without custom rifles.
223/5.56 cheap and should always be avaliable
6 creedmore, don't have one yet but want one for antelope and coyotes, i.e. I look at it as a current 243.
6.5 creed shooting steel and good for training newer shooters without burning up barrels.
7prc, I have one and love it. Very versatile similar to a 300wm which I'm sure some will disagree with. But covers elk and deer well. 7saum or 28 nos would be similar but slightly different velocity windows.
300prc, again I want one and don't yet have one. At 220+grains is big enough to take anything I would be interested in.