There are a lot of good grinders out there. I like Graef a lot, but actually use a Rommelsbacher one, as in budget and feature it came handy as well as being decent enough for my needs.
Aside from the quality of the grinders and being ceramic cones and whatnot, i really needed one feature: antistatic.
I mean, i like my coffee, but i didn’t like the powder to stick on me, the cat and the surroundings. Yes, you can avoid it by spraying the beans with water before grinding, but this adds an extra nasty step to cleaning imho.
So, this might not be an advice on a brand or model, but on a feature you should consider. Anti-static is a gamechanger for me when it comes to cleaning the kitchen.
I have a strong preference for conical. Taste is great and you can control how fine or coarse the result is way better than with flat burr only.
Surprisingly, i have no preference on ceramic or metal. It doesn’t impact the result to a level i could identify. I’ve been told to use ceramic because it is better, but honestly, i now have a metal one (partly due to budget) and i am happy.