I believe this to be the best deal going:
Mauser 98,Walnut Stock,300 Win M,Commercial : Bolt Action Rifles at GunBroker.com
Nobody else makes a rifle of this quality in this price range. Buy it, bed the action (or have a gunsmith do it), have the trigger adjusted (it is fully adjustable), mount your scope of choice and go shooting.
If you later decide you want to, you can upgrade the stock and barrel without a problem and at reasonable cost. As issued, though, the OE stuff will perform well enough that immediate upgrades will not be needed.
The only con is that the magazine length of 3.4" will likely limit you to deep seating your bullets or single feeding when you start handloading with long, streamlined bullets. Factory ammo won't present a problem.
For mounts, I recommend the EGW picatinny rail and Warne rings. Both are reasonably priced.
As already mentioned, the Zeiss Conquest scopes are an excellent value. I would recommend either the Mil-Dot reticle or the RZ800 for your application.
The SWFA SS 3-15x42 is another excellent value.
Leupold's VX-R series is also offers a great combination of features and high quality at a reasonable price.