What is a great eyeliner pencil under $20? Or something that will last me for more than a month? I line my eyes everyday and have been using Armani smooth silk eye pencil. I this product, and have it in black, brown, and deep purple. My dilemma is I go through my pencils so quickly (I have to replace one every month or so...) and at $26 a pop, I don't think I can continue on for much longer. Any suggestion is appreciated! TIA!