die grinder

Hi. I stand before the choice: GD0600 or GD0603. GD0603 is similar to the Makita 906, it's morre compact and many bonsai masters use it, but the GD0600 is twice as powerful as its younger brother (240 vs 400 w). is it worth it to take big GD0600 or will it be inconvenient to cut a tree?

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!