$10k will get you a APR full custom with a Nightforce ATACR. Would be a stretch to get a GA Precision and a March scope for less than that. If you're going to skimp on something, don't do it on the glass, it'll last you for multiple rifles.
If you only want to hit steel or paper and aren't worried about on-animal performance, any of the 6.5mms would work, but bigger will make it easier. I would choose 6.5 PRC or 6.5-284 over the 6.5 Creedmoor. 6.5 PRC might have an edge in a wider range of factory ammo offerings, but you should be buying in enough quantity that supply isn't a concern for you.
A nickels worth of free advice. Do a lot more research, and reset your budget to $5,000 - ~$2,500 for the rifle and ~$2,500 for the glass. You WILL get a rife that outshoots your ability at that price point. If APR will sell you a Ranger in 6.5 Creed or 6.5PRC for that price, go for it. Christensen would be well in that price range also. Shoot that rifle until you wear out the barrel. By then you'll know what you want to spend $10,000 on, and you'll have a very nice scope ready to go for it.