For a manual grinder Zassenhaus is reputed to be the best. I have 3-4. I have a collection of manual grinders and would consider them among the best. They had been unavailable in the US, but now can be had at several spots.
I have a collection of hand grinders, but the Zass is at the top.
If you are interested in an electric burr grinder, I have given away some grinders I bought from Costco:
Costco - Saeco Titan Coffee Bean Burr Grinder
People have been pleased. Not suitable for espresso. But it is a decent price quality point.
From there it is mainly a question of how much do you have budgeted?