Sorry but... L OH L
I find it funny that you referred me back to that review, because I just looked at all the other results pages, and there is like roughly a 10% difference in performance, even on their tests. It's quite well known that Guru 3D prefer ATI products, and will fanboy themselves into the darkest of corners... but even their ratings on the other tests show there is little difference between the cards.
Personally, paying 30% more for a card that is around 10% faster... and 5x times hotter... is kind of silly. I have bought nothing but ATI for that last 6-8 years, but this time nvidia won clearly. I also find it funny how they exclude PhysX from the Vantage tests... even though PhysX is a perfectly viable way of improving game performance. It's like being in a drag race and one guy has nitrous oxide but isn't allowed to use it because the other cry baby says it's cheating.
The funniest part is the results from COD4 though.... my PC doesn't have DDR3 ram like their test rig, and has a lower core speed (even though it's a quad core instead of dual core) and COD4 runs faster than what they are claiming they got... and yes, I had SLI turned off when I checked it.
At the end of the day, you pick whatever makes you feel more like a man... I'd personally prefer to wake up in the morning and find my PC still in one piece instead of melted into a solid lump on the floor because my video card(s) caught on fire.
If you still think that PhysX is bullshit... and that it can't be compared... then let's compare the GTX280 with a single GPU 4870 instead of the x2... because it can't be compared
In closing, the 4870x2 is freakin awesome if you can run 2560x1600... becuase at those super high resolutions they really shine (because of the twin GPU)... but if you are using a 22" monitor or smaller than it's a waste of time.