I've thought about getting a 6.5CM, but when I get down to it I start to think about dropping a $1K on a nice Tikka, then another $1500 in optics, $500 in outfitting it for me (sling, metal base, optics mounts, etc.) plus dropping another $500 minimum in ammo. So I'm easily $3K-$3.5K into it, usually more. When in all reality the difference between the .308 and the 6.5CM is negligible.
A Nosler Accubond 168gr in 308 will responsibly take a moose up to 300 yards, an elk up to 450 yards, and a deer out to 550 or even 600 yards with proper marksmanship. I just don't see any value in getting a 6.5CM unless I have a considerable amount of disposable income to blow on another gun - which if you got it, by all means have at it. No judgement at all. I personally prefer to load up on 308 ammo and get really good with it. Just my personal preference.