I think in this day and age, not wearing one is just plain ignorant. They cost what they cost, and they save lives. It's like the seatbelt argument, there's always someone willing to fly in the face of wisdom and common sense.
I too do a lot of long line work, was moving a drill in heavy rain last summer and the electrics let go. Switched to a headset for the last two lifts, never felt more exposed in my life.
Buy one that fits, regardless of brand, take care of it, and you'll have piece of mind if nothing else.
RH