You pretty much have to work to find a rifle that's really inaccurate. Today's world of machine tools is just too precise for that. Most differences have to do with fit and finish, which generally affect price far more than accuracy.
The most important thing is that the rifle fits you properly. Length of pull and drop at the comb are the two main factors. Mount a rifle to your shoulder with your eyes closed. When you open your eyes, you should be looking through the sights or the scope without moving your head from a good cheek weld on the comb of the stock. (If no sights, then along a line above and in line with the center of the barrel.)
If you plan to take up reloading your own ammo, I'd recommend the '06. If not, go with the .308. For all practical purposes if it's deer hunting and occasional varminting, the 7mm08 is a great cartridge. If you plan on more varminting with occasional deer hunting, the .243 is very good.
Scopes? The current (July) issue of Guns & Ammo has an excellent article about design criteria for scopes. Worth the read.
If it's only deer hunting, any fixed four-power scope of medium pricing will meet all your actual needs. If you think about prairie dogs, then a 3x9 variable will deal with both worlds. My 3x9s have spent 95% of their lives set on 3X when deer hunting. 9X for little stuff and sight-in.