A good grinder
http://www.farmandfleet.com/catalog/product.aspx?i=540390&h=050102006
It's variable speed, a wire wheel to get the darn paint off of the picks, and some plastic to keep the metal out of your eyeball! Also has a cup holder, one for your quenching water, and one fer your coke!
I just came across this when looking for tools that I potentially want to buy.