I have a triple monitor. Now I am thinking of improving the performance of the triple monitor. How can I do it? What is going to help me, 2 x 460 in SLI(Scalable Link Interface) or Radeon HD 5870 CFX(CrossFireX)? Both are going to cost me nearly the same. So, which will perform better? All the monitors that I am using are at 1680x1050. Please suggest.