The biggest issue is accuracy, or the lack thereof. If you have access to one that is known to be accurate, you can check yours against that one. Put a socket between the two of them, set them to the same torque setting, and tighten both. If they click at the same time, then yours is fine. You can check the beam type the same way.
I've been a helicopter tech for over 20 years and I've used all sorts of different torque wrenches. I have 3 Snap On wrenches because that's what I thought I needed when I was first starting out in this industry. As is turns out, regular calibrations and proper care will make almost any torque wrench accurate and sufficient. Pick one that fits your budget and check it for accuracy on a regular basis.
