I'm looking to get a pair of high quality die grinders for my job at Peterbilt. I need an angle and straight one. I would like to get good quality ones from Sioux, IR, Snappy, Matco, etc. I don't know what models to look at or what hp i need, they range from 0.3 to 1.0hp. Whats a typical hp that a diesel tech would use? Any help is appreciated