What is the most powerful electric screwdriver?

I drill screws into unthreaded metal at my job, we used to have pneumatic drills that made the job go pretty smoothly, but due to the jack holes I work with the guns have pooped out on us. They now have us using electric Dewalts that create a massive amount of vibration that destroys my hands. I have shopped around for an air driver but they cost like nine hundred dollars. I was wondering what the best brand/type of electric screwdriver that has enough power to do my job.