My recommendation of Proto comes from experience with the phone companies. I did lots of install work, and everything, and I mean everything gets checked in the quality audit process. Every single fastener. We even had to torque the screws on the power strips. Every company I worked for issued Proto torque wrenches, and we had them calibrated once a year. We never had problems when we used them correctly. The QA guys would test the torque on fasteners in both directions too, which is something you don't often see in the automotive world.
Working at car dealerships everybody else had Snap-On, and laughed at my Proto. Of course most of them had never heard of a Proto tool, and even fewer of them had ever seen a calibration certificate that didn't come with a brand new tool. I don't think I ran into a single tech at the dealerships that bothered having any of their tools calibrated, not torque wrenches, not multimeters, nothing.