with that much money id wait until nforce4 and dual core amd's come out, by then sli should be making an apperance, in which case the rig you are looking at now would instintainously combust upon knowing such a computer is soon to exist if not already in some lab. also with that kind of money, the only people id want to buy a computer from that cost that much would be apple, and thats cuz you know it will be top of the line for a year before something that beats it is released(from apple)
your better off making yourself your own rig with highest price : preformance ratio in mind or putting up with whatever you got now until the next generation of stuf is in retail(pcie, 939)