Until you add video cards and a power supply. Then your set back about another grand or more. Cost of Eyefinity / NV Surround without the computer, just video cards, adapters and monitors for 3x30"s is about $4,000+.
This is why I always refrain from upgrading my 24 to a 30", even with super hot deals like this. I don't feel like spending out the ass for all the supporting parts.