Re: opinions needed
If you have a SA, look also at the .260, it has a little more room for powder so you can squeek out a few more FPS over the Creed, but the Creed is shorter overall so you can seat bullets out a bit further, but that is dependent on your chamber as well.
I'd say if you don't reload, go with the 6.5 Creed (and get into reloading soon)
If you reload and have a SA, go with the .260
If you reload and have a LA, go with the 6.5x284 (and when shot out, go to a straight 284).. that's my plan.