In our shop a barrel is about $300 shipped to us and it's about $300 to $350 to cut a new chamber in your desired caliber. If you want the action blue printed at the same time, or if you want barrel fluting to reduce weight, or anything else, then Brett does a sort of action package deal and you get a better overall price instead of doing it piece meal. Looks like from Krieger direct they charge $270 to cut a chamber for you on their own barrel & $60 to thread it to your action, but I think you have to provide them the action, so you will be without it for awhile.
CptTango is right - For better results you have to spend more money. And I don't hate the Remington, I just think there are better choices out there. But it is good that we can exchange opinions about it and still remain friends.
If you're shooting benchrest, like real competition bench rest, no factory stick is going to compete, you will need to design and build a gun from the ground up. That gun will look nothing like your average weapon and can have all sorts of crazy sh!t done to it like electric triggers and big rails on the sides of the stock to travel smoothly on the bag. The guys that do serious benchrest shooting have some CRAZY guns that run into the multiple thousands of dollars - and that is before they add a $2000 or $2500 custom, enhanced reticle, 40x power scope.