same but sli is pointless:
sliing=100% of the cost for a 30-40% performance gain
overclocking card: 0% of the cost for a 10-20% performance gain
that means that you double the cost of the card but only gain 10-20% difference in performance which would raise you around 6fps wow big leap....... just buy the best single card you can afford. If you can't afford te best single card off the bat then buy an EVGA card and use the 90-day step up program to upgrade the card when you have more money in 3 months time