I have a 24 inch monitor that I use for gaming and runs at 1900X1200. If I want to run either SLI or Crossfire, which model of Nvidia and AMD cards would you recommend to do this for this resolution. Is this resolution even high enough to warrant 2 video cards or would I be better off with just one newer one (just wondering if I could get a good deal running 2 cards of an older model)? I read that 2x GTX460's or 2x6950's might be a good deal? What are your thoughts?