If you want to drop money on a good grinder, I may suggest looking at a little known secret: Baratza refurbs. For example, you can get this
$250 Virtuoso for $170 if you get a refurb. Or, you can get the
$145 Maestro Plus for $95 (currently OoS, but keep checking).
I got my Virtuoso refurb 6 months ago or so for $145 (I guess the price changed a bit). It's been a great grinder.
The only thing to note is that if you want to do legitimate espresso, you need to spend a bit more money and go to a Precisio.
If you want one of the best grinders out there that I've seen nothing but praise for, check out the Rancilio Rocky, but you'll be paying a pretty penny for it.
If you want to see some reviews, check out the Seattle Coffee Gear videos on YouTube. I find them quite informative.