Eye primer- lasts all day, doesn't empty the wallet? I'm looking for a great eye primer, mainly for eyeshadow. I wear not particularly expensive eyeshadow- I need to splurge on a new palette.  
  
Anyways! I have heard good things about Urban decay primer potion, but is at the highest end of my price range. Are there any other options that people really like and work for colors and lasts for a while? (6hours min)