I bought an angle grinder at HF a few years back for about $15, not really knowing what I would do with it. It has become one of my most used tools! I really think I need two so I won't have to keep swapping from the cutting disc the grinding disc.
Speaking of angle grinders and drill presses, I often use both at the same time.
Another useful little tool is a tile saw with a grinding disc in it instead of a diamond blade. It makes nice straight/precise cuts.