Originally posted by: Wanger
You have to run the 7950 in SLI? I thought I just read some where that it works on non-sli boa
You do not always have to have an SLI supported chipset on your motherboard to utilize that. I think there are like 52 or so boards that are supported by it and not all of them are nF4 chipsets or greater. You have a supported board anyway since you have two 7900gt's.
Like I said, in order to get the performance of a pair of 7900gt's without having to sacrifice dual-monitor support at the same time, you would have to have a very powerful graphics card. The X1900 is probably one of the best GPU's ever made, and the 7900 is a very, very nice competitor to it, but both when alone can not perform to an amount that you have right now. G80, R600, or maybe (but I doubt it) R580+ might be able to do what you are wanting.
You could wait, or you could buy an EVGA 7900GTX for now so you'll get your dual-monitor support and have a possible step-up available for a G80. You'll suffer a performance decrease for a little while, but compensate it for two monitors and a potential step up to a greater card.