I've always liked the .458 SOCOM out of the 3 big bore AR choices. But for practicality, I'd go 6.8 SPC II. It's much better balanced and gives you more options should you want to shoot past 100.
With that said, I have a hankering for a .358. I know I'm going to end up with one. I just can't decide if I want a bolt or Savage 99.
Thanks for the input but I can't see a 6.8 replacing the craving for the big bore thumping power of the 358 win.That's the only reason I was considering one of the 458 AR calibers. An upper would possibly be a quick and easy to scratch the itch.
