Break-away, clicker ones are nice but need to be stored with the scale at zero. Also, DON'T DROP. They will need calibrating every couple of years, also more expensive. Positives of breakaway are that you don't need to see the scale, you will feel and hear it click when you get to the torque you have set. The pointer style are more basic, you will always have to see the scale to know where you are. Cheaper, maybe not as accurate as breakaway, but you will get very close, within tolerance anyway. Calibration? Just make sure pointer is at zero before you start. More differences, pros and cons for each, but I think I hit the main ones. And yeah, a torque wrench is a needed tool now days for your new car as well as if you plan on working on your classic. Hope this helps.