Is there any other rifle in this category that has a better reputation for out of box accuracy?
Yes, IMHO there is such a rifle.
The new South Carolina FN made Winchester m70 Extreme Weather rifles for basically the same money -about $1,000 street price.
In the WSM rounds they are listed at 6.75 pounds- about 1/2 pound more than the Kimber Montanas.
Across the board the new FN m70s seem to have a better rep for out of the box accuracy than the Kimbers. They also seem to have less QC issues overall.
Kimber lovers / M70s haters here please note- I am talking about the NEW m70s- not the New Haven guns.