I've used a few from WSP that I have gotten as samples. Baby Grasshopper Green stands out in my memory as one that I really liked. I did buy one from the oil-locking line, called "Red-Orange" I think, because it morphed into this beautiful orange color (the mica itself is a shocking bright magenta color). If I had bought it for the magenta color, I would have been a sad sad girl.
I get all of my mica's from micasandmore.com. It's a group buy and good prices, if you don't mind waiting a few weeks. It runs every month through October. Just in case you want to look at another mica supplier option. PS I have also used Mad Oils and they have nice micas too.