Stila double brushes. Anyone tried them?

[Geek2]

They seem to be a good idea but the set is pricey. What brushes are your favorite?

My favorites are :

• Laura Mercier flat eyeliner brush
  
• Chantecaille eye shadow brush
  
• Nars concealer brush
  

 

[Tinydancer]

Right now I mostly have MAC brushes which I like a lot! But, if I had my choice I'd get the Kevyn Aucoin brush set http://store.yahoo.com/kevynaucoin/bruscol.html I can dream right?