For Idli/Dosa, we use an Indian style mixie or stone grinder (depending on the quantity we are making). Some of our equipment is pretty old so we don’t even know if they make those models anymore. When buying grinders/blenders, etc, look at the watts. Buy the most watts you can afford…the more watts, the more power you will get. Cuisinart and Black and Decker are some of the brands we’ve used before.