Guruboy, you can thank Ryan for that excellent article.
I guess Guruboy and I are the Lone Ranger's here.
For me, SLI is definately worth it. I can turn up all the features in a game and enjoy all the eye candy at 100% Ever see FarCry at 8x anti-aliasing with the framerate over 70?..Or Doom3 or Battlefield2 with the same thing.
I guess you have to see all the eye candy turned up all the way AND still have a decent framerate on a 1200x1920 monitor to understand the difference. It feels much more like you are actually there. I don't know how else to describe it. It probably has something to do with filling a greater percentage of the human field of view with more pixels.
Who is to say what others should be spending to get an incremental increase in graphics power? Should that not be the decision of the user and not some stranger trying to decide what someone else should and should not be spending? Different people have different values when it comes to spending their money. Different people also have different amounts of disposable income. Just because you disagree with how someone has spent their money does not make the other person wrong...they just have different values when it comes to money.
I have run my computer with one 7800GTX and with two 7800GTX's and I can assure you there is a difference, regardless of what the magazines and websites are saying. Do they test these cards with an overclocked FX-57 and 2 Gigs of overclocked RAM? For me, the difference between one and two graphics cards was worth it, and thats what counts.