I would skip the Choate stock and get the SSS LVT instead. Much better stock for only a little more money.
Unless you are going to shoot tactical matches where you need the quick reload, skip the detachable mag for now. Spend the money on the scope.
I would go with burris double dovetail bases and the burris signature rings. This setup is as solid as anything else and has the MOA inserts where you can put between 5 and 40 MOA in your set up and only costs around $75.
Go with the new Sightron S3 in 6-24x50 with mil dots. Glass is clearer than the NF, solid turrets and clicks and 100 MOA elevation compared to maybe 50 with the Bushnell and less clear glass. Go to www.6mmbr.com
and read the writeups on it.
good used setups for what you want are often available on www.savageshooters.com
and all the parts and links also.
On Savage shooters you can get a new 30" savage 308 barrel that is really shooting with the new Sierra 155 bullets and shooting well inside the 175 SMK for both windage and elevation.