It thought you meant single GTS G92 instead of SLI 8800GT's
And not over here they are; I can buy the cheapest 8800GT at 130,- euros:
Clicky
And the cheapest 8800GTS here costs:
Clicky
That's a difference of roughly 65,- ...So in total that would be 130,- euros... 130 euro's I would spend more wise on a different processor (such as a Q6700, which only differs in price from the Q6600 with 70 euro's) instead of 2 overkill cards :p
But I won't change the cards, nor will I change the processor seeing if I spend another 130,- euro's I'd blow the budget with 100,- ... And I think that 1200,- euro's for a computer is more then enough. (and the Q6700 might OC better... But I'm not pushing further then 2.8 or 3.0 anyway so really there is no use)