I cannot overstate the value of having this tool for any Photoshop painter. Since I last posted about MagicPicker, Anastasiy has made updates and improvements. Version 1.2 is rock solid (it has never crashed), fast and full of great features. Painting in Photoshop is so much more fun and intuitive when you're not constantly stopping to fuss with the default color picker.
And you definitely can't beat the price! Check it out:
I prefer to have the color picker set to the square format and I keep it above my layers panel (see below).