Hello. I want to get three monitors for gaming and i have some questions about which graphics card to buy. I currently have a Nvidia GeForce GTX 560 on a ASUS P8Z68-V PRO Mobo. I only have one monitor running off of the card right now, but i am planning on putting another monitor on that card, and then purchasing a new card for the third. So, would i have to get the same exact card or could i get one with the same GPU, but with less memory such as this one http://www.newegg.com/Product/Product.aspx?Item=N82E16814130770 ? I want to find the cheapest way to get three monitors for the cheapest price, but without sacrificing quality. Thank you.