What are you going to do with it?
Bell and Carlson and HS Precision use the same construction technique and I can see no advantage either way. B&C is almost always a little less expensive, but HS does offer some options not available from B&C. If B&C makes what you want I see no reason to pay extra for HS-Precision.
For a target/tactical type rifle where you're not concerned about weight Magpul is a decent stock. Just personal preference, but I don't like the styling. If you do, and don't mind the weight it is a good stock. I have some friends with them.
On a hunting rifle, none of the above. All are too heavy for my tastes. B&C does offer what they call a lightweight version, but compared to others it is still overweight.