I'm building a computer and I want to build it so its dual graphics card ready so when I start feeling some lag in games I can either put another card in or use the SLi/Crossfire as a selling feature and eBay it. The thing is, I cant decide between SLi or Crossfire. My processor will probably be a E6600 Core 2 Duo (even though I'm an AMD fan). My buddy keeps insisting that ATI makes the fastest cards and Crossfire is the future... but right now SLi is the most advanced and its right now that I'm buying the motherboard technology. So who is right... should I do Crossfire or SLi? Also, is the extra money spent making the system SLi/Crossfire ready worth it? I mean, for example, reading reviews and charts having two 7950GT's only seems to have a 30% performance advantage over having a single 7950GT. Not worth spending another 200 dollars in the build for a better PSU and motherboard plus the extra 300 dollars for the card... in my opinion. Or am I wrong?