Hi, the 6.5 is a great option, I believe you are on your way to making a great choice. A 260 running 2860fps (average loaded velocity) and a 120 Amax (bc of .465) will be -3.98 moa drop at 300, -13.47moa at 600, -27.35moa at 900. A Creedmoor will be 3020 fps (average loaded veleocity) with the same bullet. -3.48moa at 300, -11.84moa at 600, -24.03moa at 900. A you can see there is a slight velocity advantage to the Creedmoor, there is slightly less drop, but thats about it. You have the same bullet selection for both rifles, both avalible in same or very similar twist rates and barrel lengths. Creedmoor has become mainstream enough now that brass is no longer an issue to find, but I would say 260 is still a little easier to find and if not form from .308 or .243. Barrel life is likely a touch better in the 260, but also not really a bearing anymore with all the barrel options and reasonable pricing. I went through the same options a very short time ago, settled on the 260 (which is now for sale in the EE) and also bought a 6.5x284 that I will use for hunting. It is really going to boil down to personal preference. Hope you are happy with your desicion, either choice will be a great one, enjoy!