Which is a better herb grinder? Space Case or Sharp Stone?

[Josh]

I am about to buy an herb grinder, but cant decide if i sohuld spend the extra money on a space case or if i should just go with the sharp stone grinder. I hear that space case and sharp stone are the 2 best brands of herb grinders but sharpstone is so much cheaper. any advice? Here is where i am comparing the prices : www.sharpstonegrinders.com