My first watercolor teacher recommended the Winsor & Newton brand as good, non-fading colors (most of them) and they also aren't as expensive as some of the other watercolors on the market.  I've been using them ever since.  I used to dream of owning every color in the W&N repertory,  but experience has taught me that I don't really need a wide variety of colors.  It's better to mix up my own, but ochre is a must-have for landscape painting.