Hello everyone I am building a computer. I am trying to decide on video cards. my two options are 6850 x2 or 6870 x2. I will use this computer for gaming on a 23 inch monitor. I will also watch blurays and stream you tube to a 42 inch monitor. I gave read that crossfire is for bigger monitors that's why i am deciding to crossfire. If my research is wrong and i can connect my computer to a 42 inch monitor with a single card then please let me know. Also which card would benefit me more. Thanks in advance.