KMG is nice, you can also get a grinder in the box, wilton, eerf, bader BIII, etc. Lots of grinders out there. I have the KMG, but wish I saved more for the TW90.
HOWEVER the TW90 is more than double the price of a KMG.
A 2x72 grinder is super handy, makes quick work of just about all the many little things I do. Bolts too long? grind it down in 5 seconds.