power tools

Does anyone know of a guide or a book or a series of videos I can read/watch that at least gives a primer on the use of rotary tools/die grinders for the creation and enhancement of deadwood? More specifically, I want to know things like how to handle the tool, what the different bits do, what...

I'm wanting a rotary grinding tool for some upcoming carving work. What do you recommend? Criteria: Good value (not cheap; not expensive) Reasonably quiet Good for detailed work Durable Low maintenance Do I want it electric or air? If air, please recommend a compressor, too!