I used up 2 Dremels over the years at work. They performed well, and didn't vibrate much. For myself, I had a very inexpensive lesser brand that I bought mostly for 1 particular job. That, and it came with an assortment of maybe 50 different burrs, sanding tools, buffing wheels, etc. Compared to the Dremel, it was loud and vibrate a good bit more. Broke down after about 18 mo.s of intermittent use.
To go somewhat off topic, I keep being tempted to blow my budget on an air powered rotary tool, such as the Turbo Carver. Definitely in a different price bracket, and mostly used for extreme detail. But I'd love to have something fine enough to carve egg shells, but powerful enough to engrave polished granite.