You really can't go wrong with any of the 6.5mm calibers. It all depends on if the shooter reloads,and the performance they are wanting.
I shoot a 6.5 Creedmoor custom bolt action that I built.
A 260 Rem in a DPMS LR-260H platform,that I use for hog hunting.
And,I'm almost finished building a 6.5-06 for a long range hunting rig. I have everything done except the stock,need to put 6 more coats of Tung oil on it.
The Creedmoor is an outstanding shooter,and allows the shooter to take advantage of the long match bullets,and remain an OAL that still fits into a magazine - something the 260 Remington rifles can have problems with.
I would've bought a 6.5 Creedmoor from DPMS if they offered it in a lighter barreled version like the 260 that I bought,but since they didn't,and I was only planning on using it as a hunting rifle,the 260 works fine for me.
My 300 WM barrel was near the end of it's competitive life,and I decided to change it into a 6.5-06 long range hunting rifle just because I could,and I've always wanted a 6.5-06.