6.5 Creedmoor Impact Precision Pre-fit? & Wrench?

I'm not planning on competing with the rifle so I was thinking of doing more of an all-around build. Something I could shoot off the bench with but carry around as a field rifle / hunting rifle. It'll likely do 90% range / 10% walk-around.

Thought was maybe a 26'' carbon fiber barrel for weight savings but still get good velocity out of it at 26''? I figure that it'll wear a suppressor for MOST of the shooting I'll be doing. I should ask what kind of impact the suppressor comparably has on heat/stringing vs no suppressor on a medium contour barrel.

I have an AAC SDN6 in 308 that I already have an old brake for. I know it's not a 'precision' suppressor, but I've heard mixed results on whether or not that kind of muzzle brake suppressor negatively affects accuracy. I figure I would at the very least TRY to run it before getting something dedicated.