Best makeup concealer for oily/combo skin with acne and redness?

I'm investing in a good concealer. I've been using drugstore cheap kind and they just slide off my face. I was thinking in the $10-25 price range. I'm thinking about Erase Paste or Boi-ing by benifit. Also the MAC concealers, which is best for my type of skin? any sudgestions are helpful.