Hey Newt, hows the Dakota life treating you?
For a mag fed hunting rifle I would go with a Savage or Remmy 700. Both are kind of like the small block chevy of actions.... everyone makes parts for them and they are cheap to work on. The Savage is a lot easier to work on for the hobby enthusiast with the floating bolt and the fact you can change barrels without any machining due to the barrel nut. All you need is a barrel vise, the nut wrench and the appropriate go gauge to change the barrel. You can even look for a cheap Stevens action and put a trigger in it. Personally I like the one from Sharp Shooters Supply.
Caliber wise between the 6.5 Creedmore and .260, I would go with the 6.5. It's just a better cartridge, designed with technology not available when the .260 was introduced. If you wanted to go 6mm the 6BR cartridge is a real sweetheart.
For a barrel, Shillen while good, can be hit or miss. If you want a sure hit I would suggest looking at Benchmark barrels. Contour wise if you are going to cover any ground with this rifle I would't go any heavier than what's called the Savage factory varmint contour, probably even lighter and if it was me would have it cut at 24".
I would never put a brake on a hunting rifle just due to the noise. Even if you are one of the few that wear hearing protection while hunting (not counting prairie dogs), most likely the buddy next to you wont be and he's gonna be pissed when you touch one off. Suppressors are a different story you lucky bastard
The Stock you are looking at is nice, but I would skip the nice paint job on anything less that a strictly competition gun. Rattle can that baby and laugh when it gets scratched or chipped. Or like Headhunter mentioned some of the new B&C stocks are pretty nice for the cabbage. The money saver stocks are pretty rough when you get them and don't come with sling studs or a recoil pad. So you will have $300 or more in it before you're done, just something to keep in mind.
Dies... I like the Redding bushing size dies and Forster Micrometer Benchrest seater dies. Stick with good brass (ie Lapua) and with a little research most likely you'll only have to buy one busing for the sizer.
You've got my number, feel free to hit me up if you have any questions.