do you have counterspace requirements? If not, I would strongly, strongly recommend a Mazzer Super Jolly (used). I've owned a Solis Maestro, Mazzer Mini, and 2 Super Jollies--1 used, and one new (only one grinder at a time though). I would say that the difference of the super jolly, used or new, over the other grinders (even the Mini) is remarkable. It will make your life easier if you can fit it in your kitchen. Searching "Mazzer" on
eBay will get you a lot of hits, usually, in the $200-350 range, with varying conditions. It would take caution and patience, but I can tell you from experience it pays off.
Of course, if you don't want to get your hands dirty, it might not be the thing for you, but it is definitely one highly cost-effective way to get a superb grinder.