Nothing wrong with your choice, but you really don't need to worry so much. The margin on torque "specs" for the stuff you're doing is pretty big. In the case of things like stem bolts, the spec is for the lowest value (with margin) that will keep the stem or bars from slipping, not the highest value that you can use without crushing the tube. Using a torque wrench is a good thing, but even if it's calibration is off by 20% the worst problem you'll have is not getting things quite tight enough.