I'm looking into these four options. What would give me the best performance? I want to max gaming as much as possible (using 1080p or 1440p if possible) and do light video editing. It will be likely paired with an Intel Core i7-4770K and Asus Maximus VI Hero ATX LGA1150 if it's all compatible. Also, can you give me your opinion on the cards listed as singles (in case I forgo the dual GPUs). Thanks so much for any opinions. And as always, other recommendations are welcome
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202080 (Crossfire)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814487003 (Single Card)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127770 (Single Card)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814487037 (Single Card)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202080 (Crossfire)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814487003 (Single Card)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127770 (Single Card)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814487037 (Single Card)